SRK Publications

Prof. Kotha's Group
Department of Chemistry, Indian Institute of Technology, Bombay, India

Recent Publications [updated on September, 2009]

Our article entitled "Recent applications of Suzuki-Miyaura coupling reaction in organic synthesis" published in Tetrahedron 58, 9633, 2002 has been ranked as the third most requested article during 2003 and 5^th position during 2004. Details are available at http://www.cas.org/spotlight/ Special Citations

2010

[139] S. Kotha, V. Seema, K. Singh K. D. Deodhar
Molecular acrobatics in caged systems: Stratetic utilization of catalytic metathesis and photo-thermal metathesis in polycyclic frames.
Tetrahedron Letts. 2301, 2010.

[138] S. Kotha, S. Halder
Ethl isocyanoacetate as useful glycine equivalent
Synlett 337, 2010.

[137] S. Kotha, S. Misra, N. G. Krishna, D. Nagaraju
Diversity oriented approach to 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (Tic) derivatives using diethyl acetamidomalonate as a glycine equivalent. Further explansion by Suzuki-Miyaura cross-coupling reaction.
Heterocycles 847, 80, 2010.

2009

[136] S Kotha, D. Kashinath, M. Lopus, D. Panda

Synthesis of nano-sized C3-symmetric 2,4,6-triphenyl-1,3,5-s-triazene and 1,3,5-triphenyl benzene derivatives via the trimerization followed by Suzuki-Miyaura cross-coupling or O-alkylation reaction and their biological evaluation.

Indian. J. Chem. 1766, 48B, 2009..

[135] S Kotha, P. Khedkhar

Differential reactivity pattern of hybrid o-quinodimethane precursors: Strategic expansion to annulated benzocycloalkanes via Rongalite.

J. Org. Chem. 5667, 74, 2009.

[134] S. Kotha, M. Mishram, A. Tiwari

Advanced approach to polycyclics by a synergistic combination of enyne metathesis and Diels-Alder reaction

Chem. Soc. Rev. 2065, 38, 2009.

[133] S. Kotha, P. Khedkhar

A diversity oriented approach to diphenylalkane derivatives by strategic utilization of [2+2+2] cyclotrimerization, cross-enyne metathesis and Diels-Alder reaction.

Eur. J. Org. Chem 730, 2009.

[132] S. Kotha, A. Deb, K. Lahiri, E. Manivannan

Recent synthetic approaches to spirocyclics.

Synthesis 165, 2009.

[131] S Kotha, D. Bansal and Vinod Kumar

Synthesis of symmetrical and unsymmetrical trisubstituted benzene derivtives through ring closing alkyne metathesis strategy and depropargylation under various catalyst conditions. .

Indian J.Chem. 225, 2009..

[130] S. Kotha, K. Mandal

A retrospective on the design and synthesis of nvel molecules through a strategic consideration of metathesis and Suzuki-Miyaura cross-coupling reaction.

Chem. Asian. J. 354,4, 2009.

2008

[129] S Kotha, S. Misra, S. Halder

Benzannulation.

Tetrahedron 10775, 2008.

[128] S Kotha, P. Khedkhar

Synthesis of conformationally constrained phenylalanine derivative by a strategic combination of ring-closing enyne metathesis and Diels-Alder reaction.

Synthesis 2925, 2008.

[127] S. Kotha, D. Kashinath, S. Kumar

Synthesis of liquid crystalline materials based on 1,3,5-trihenylbenzene and 2,4,6-triphenyl-1,3,5-triazine.

Tetrahedron Lett. 49, 5419, 2008.

[126] S. Kotha, A. Deb

Design and synthesis of spiro-heterocycles by ring-closing metathesis.

Indian J. Chem. 47B, 1120, 2008.

[125]    S. Kotha, V. R. Shah

Synthesis of C₃-symmetric and C₄-symmetric amino acid derivatives via Suzuki-Miyaura cross-coupling reaction.

Amino Acids. 35, 83, 2008.

[124] S. Kotha, V. R. Shah, P. P. Mishra, A. Datta

Design and synthesis of a novel antharacene-based fluorescent probe through the application of the Suzuki-Miyaura cross-coupling reaction

Amino Acids. 35, 169, 2008.

[123]     P.Kumaradhas, Kundan R.Gupta, S. Kotha, E. Brahmachari, K.A.Nirmala

Crystal Structure of 2,6-Diisocyno-1,2,3,5,6,7-hexahydro-s-indacene-2,6-dicarboxylic acid diethyl ester.

             Analytical  Sciences  24, 65, 2008.

[122] S. Kotha, V. R. Shah

Synthesis of 1-benzazapine derivatives via strategic utilization of Suzuki-Miyaura cross-coupling, aza-Claisen rearrangement and ring-closing metathesis.

Eur. J. Org. Chem. 1054, 2008.

2007

[121] S. Kotha, V. R. Shah

Synthesis of bis and tris-oxazole derivatives via the application of Suzuki-Miyaura cross-coupling and van Leusen oxazole synthesis.

Synthesis 3653, 2007.

[120] S. Kotha, K. Lahiri

Design and synthesis of diverse polycyclic compounds via catalytic metathesis.

Synlett, 2767, 2007.

[119] S. Kotha, K. Singh

Cross-enyne and ring-closing metathesis cascade: A building-block approach suitable for diversity oriented synthesis of densely functionalized macro-heterocycles with amino acid scaffolds.

Eur. J. Org. Chem. 5909 2007.

[118] S. Kotha, D. Kashinath and P. Khedkar

Synthesis of crown based sulfones via Rongalite: Diversity oriented approach to annulated benzocrowns by Diels-Alder reaction.

Synthesis 3357, 2007.

[117] S. Kotha, K. Mandal

Metathesis of a novel dienediyne system. A unique example involving the usage of in situ generated ethylene as cross-enyne methathesis partner.

J. Organomet. Chem. 629, 4921, 2007.

[116] S. Kotha, P. Khedkar

Synthesis of conformationally constrained a-imino acid derivatives via ring-closing metathesis.

Indian J. Chem. 46B, 975, 2007.

[115] S. Kotha, V. R. Shah, K. Mandal

Formation of Arenes via Diallylarenes : Strategic utilization of Suzuki-Miyaura cross-coupling, Claisen rearrangement and ring-closing metathesis.

Adv. Synth. Cat. 1159, 2007.

[114] S. Kotha, V. R. Shah, S. Halder, R. Vinodkumar, K. Lahiri

Synthesis of bis-armed amino acid derivatives via the alkylation of ethylisocyanoacetate and the Suzuki-Miyaura cross-coupling reaction.

Amino Acids 387, 2007.

[113] S. Kotha, S. Banerjee

Synthesis of Novel 1, 2, 3, 4-tetrahydroioquinoline-3-carboxylic acid (Tic) derivatives through the application of Rongalite

Synthesis 1015, 2007.

[112] S. Kotha, K. Mandal, S. Banerjee

Synthesis of novel quinone-amino acid hydrbirds via cross-enyne metathesis and Diels-Alder reaction as key steps.

Eur. J. Org. Chem 1244, 2007.

[111] S. Kotha, K. Lahiri

Expanding the diversity of polycyclic aromatics through Suzuki-Miyaura cross-coupling strategy.

Eur. J. Org. Chem. 1221, 2007.

2006

[110]    S. Kotha
            Synthesis of novel polycyclics via catalytic metathesis.
            Punjab Univ. Res. J. (Science) 56, 223, 2006. (invited article)

[109]    S. Kotha, M. Behera
            Preparation of functionalized tetraphenylmethane derivatives via the Suzuki-Miyaura cross-coupling reaction.
            Indian J. Chem. 45B, 2684, 2006.

[108]    S. Kotha, K. Mandal
            Suzuki-Miyaura cross-coupling and ring-closing metathesis: A strategic combination for the synthesis of cyclophane derivatives.
            Eur. J. Org. Chem. 5387, 2006.

[107]   S. Kotha, K. Mandal, A. Tiwari, S. M. Mobin
            Diversity-oriented approach to biologically relevant molecular frameworks starting with b-naphthol using Claisen rearrgement and olefin
            metathesis as key steps.
            Chem. Eur. J. 8024, 2006.

[106]    S. Kotha, M. K. Dipak
            Design and synthesis of novel preopellanes via Clasien rearrangement and ring-closing metathesis as key steps.
            Chem. Eur. J. 4446, 2006.

[105]    S. Kotha, S. Banerjee, M. P. Patil, R. B. Sunoj
            Retro Diels-Alder reaction under mild conditions: experimental and theoretical studies.
            Org. Biomol. Chem. 1854, 2006

[104]    S. Kotha, A. Deb, S. Chattopadhyay
            Design and synthesis of spirocyclics via the Diels-Alder reaction and ring-opening cross-metathesis as key steps.
            Lett. Org. Chem. 3, 128, 2006.

[103]   S. Kotha, A. Ghosh
            A new and simple synthetic approach to functionalized sulphone derivatives by the Suzuki-Miyaura cross-coupling reaction.
            Indian J. Chem. 45(B), 227, 2006.

2005

[102] S. Kotha, E. Brahmachary, K. Lahiri

Tansition metal-catalyzed [2+2+2] cycloaddition and application in organic synthesis.

Eur. J. Org. Chem. 4741, 2005.

[101]    S. Kotha,   P. Khedkar, A. K. Ghosh
            Synthesis of symmetrical sulfones via rongalite: expansion to cyclic sulfones by ring-closing metathesis.
            Eur. J. Org. Chem. 3581, 2005.

[100] S. Kotha, K. Mandal

Design and synthesis of cyclophane via Suzuki–Miyura cross-coupling and metathesis as key steps.

Adv. Synth. Cat 1215, 2005.

[99] S. Kotha, M. Behera, V. R. Shah

A simple synthetic approach to allylated aromatics via the Suzuki-Miyaura cross-coupling reaction.

Synlett 1877, 2005.

[98] S. Kotha, D. Kashinath

Synthesis of functionalized benzo-18-crown-6 compounds via the Suzuki-Miyura cross-coupling reaction.
Synthesis 971, 2005.

[97] S. Kotha, A. C. Deb, R Vinodkumar

Design and synthesis of spiro-annulated barbituric acid derivatives and its analogs by ring-closing metathesis reaction as key steps.
Bioorg Med. Chem. Lett. 15, 1039, 2005.

[96] S. Kotha, K. Lahiri

Post-assembly peptide modifications by chemical methods.

Curr. Med. Chem. 12, 849, 2005.

[95] S. Kotha, R. Sivakumar

An iterative approach to higher polyquinanes.

Arkivoc (xi), 78, 2005.

[94] S. Kotha, S. Halder

Synthesis of macrocyclic cyclophane-based unusual a-amino acid derivatives.

Arkivoc (iii) 56, 2005.

2004

[93] S. Kotha, S. Banerjee, K. Mandal

Oxidative dehydrogenation and the aromatization of polycycles using o-iodoxybenzoic acid (IBX).

Synlett 2043, 2004.

[92] S. Kotha, A. Ghosh

Cycloaddition approach to indane based a-amino acid derivatives.

Tetrahedron 60, 10833, 2004.

[91] S. Kotha, K. Singh

N-Alkylation of diethyl acetamidomalonate: Synthesis of constrained amino acid derivatives by ring-closing metathesis reaction.

Tetrahedron Lett. 45, 9607, 2004.

[90] S. Kotha, K. Mandal

Microwave assisted Claisen rearrangement on a silica gel support

Tetrahedron Lett. 45, 9603, 2004.

[89]      S. Kotha, M. Behera, P. Khedkar
            Environmentally benign processes for the synthesis of N-formyl amino acid esters
           Tetrahedron Lett. 45, 7589, 2004.

[88] S. Kotha, A. Ghosh

A Diels–Alder approach for the synthesis of highly functionalized benzo-annulated indane-based a-amino acid derivatives
via sultine intermediate.

Tetrahedron Lett. 45, 2931, 2004.

[87] S. Kotha, K. Mandal

A new protocol for benzoannulation by double Claisen rearrangement and ring-closing metathesis reaction as key steps.

Tetrahedron Lett. 45, 2585, 2004.

[86] S. Kotha, K. Mandal

Metathetic approach to napthoxepin and spirocyclic molecular frame works.
Tetrahedron Lett. 45, 1391, 2004.

[85] P. K. Thallapally, R. K. Jetti, A. K. Katz, H. L. Carrel, K. Singh, K. Lahiri, S. Kotha, R. Bose, G. Desiraju

Polymorphism of 1, 3, 5-trinitrobenzene induced by trisindane additive

Angew. Chem. Int. Ed. 43, 1149, 2004.

[84] S. Kotha, K. Lahiri, D. Kashinath, R. B. Sunoj

Synthesis of C₃-symmetric nano-sized polycyclic compounds by trimerization and Suzuki Miyura cross-coupling reactions.

Eur. J. Org. Chem. 4003, 2004.

[83] S. Kotha, M. Behera

Alkylation of isonitrile derivatives with 2,2′bis(bromomethyl)1,1′-biphenyl.

Indian J. Chem. 43B, 922, 2004.

[82] S. Kotha, M. Behera

Synthesis and modification of dibenzylglycine derivatives via the Suzuki-Miyaura cross-coupling reaction.

J. Peptide. Res. 64, 72, 2004.

[81] S. Kotha, A. Ghosh

The Diels–Alder approach for the synthesis of tetralin-based a-amino acid derivatives and their modification by Suzuki-Miyaura cross-coupling reaction.

Synthesis 558, 2004.

[80] S. Kotha, A. Ghosh

Synthesis of symmetrical and unsymmetrical 9, 10-diarylanthracene derivatives via bis Suzuki-Miyaura cross-coupling reaction

Synthesis 549, 2004.

[79] S. Kotha, E. Brahmachary

Synthesis and reactions of silicon containing cyclic a-amino acid derivatives.

J. Organomet. Chem. 689, 158, 2004.

[78] L. Damodharan, V. Pattabhi, M. Behera, S. Kotha

Optimization of interactions in crystal packing revealed by crystal structures.

[ethyl 2-(formylamino)-3-thien-2-yl-2-(thien-2-ylmethyl)propanoate and ethyl 3-(5-bromothien-2-yl)-2-[(5-bromothien-2-yl)methyl]-2-(formylamino)propanoate]

J. Molecular. Stru. 705, 101, 2004.

[77] L. Damodharan, V. Pattabhi, M. Behera, S. Kotha

Conformational switching caused by dibenzyl substation at C^a position.

Acta. Cryst. C60, 527, 2004.

2003

[76] S. Kotha, K. Lahiri

Application of the Suzuki Miyaura cross-coupling reaction for the modification of phenylalanine peptides.

Biopolymers 69, 517, 2003.

[75] S. Kotha, S. Halder

Synthesis of optically active benzocyclobutene and biphenylene based unusual a-amino acid derivatives.

Indian J. Chem. 42B, 863 2003.

[74] L. Damodhara, V. Pattabhi, R. Sivakumar, S. Kotha

Precursors to dodecahedrane

Acta. Cryst. C59, 373, 2003.

[73] L. Damodharan, V. Pattabhi, M. Behera, S. Kotha

Ethyl-2-formamido-2-(4-iodobenzyl)-3-(4-iodophenyl) propionate and ethyl-2-(3-bromobenzyl)-3-3-bromophenyl)-2-formaidopropionate.

Acta Cryst. C 59, 216, 2003.

[72] S. Kotha, E. Manivannan

Synthesis of spirocyclics via ring-closing metathesis reaction.

Arkivoc, (iii) 67, 2003.

[71] S. Kotha

The building block approach to unusual a-amino acid derivatives and peptides.

Acc. Chem. Res. 342, 2003

2002

[70] S. Kotha, K. Lahiri, D. Kashinath

Recent applications of the Suzuki-Miyaura cross-coupling reaction in organic synthesis.

Tetrahedron 58, 9633, 2002.

[69] S. Kotha, S. Halder, E. Brahmachary

Synthesis of highly functionalized phenylalanine derivatives via cross-enyne metathesis reactions.

Tetrahedron 58, 9203, 2002.

[68] L. Damodaran, V. Pattabhi, N. Shamaladevei, M. Behera, S. Kotha.

Ethyl-6-acetylamino-6,7-dihydro-5H-dibenzo[a,c]cycloheptene-6-carboxylate

Act. Cryst. C58, 266, 2002.

[67]      S. Kotha, E. Manivannan
             Synthesis of functionalized cis-syn,cis-triquinanes.
             Indian J. Chem. 41B, 808, 2002.

[66] S. Kotha, S. Halder, N. Sreenivasachary

Synthesis of dibenzocyclobutenyl glycines derivatives.

Arkivoc, 21, 2002 (VII).

[65] S. Kotha, S. Halder, K. Lahiri (nee’ Chakraborty)

Modification of indane-based unusal a-amino acid derivatives via the Suzuki-Miyaura coupling reaction.

Synthesis 339, 2002.

[64] L. Damodharan, B. S. Ibrahim, V. Pattabhi, S. Halder, S. Kotha

anti 2,19-Diethoxycarbonyl-2,19-diformylamino[3.2.3.2]paracyclophane.

Acta Cryst E58, 1038, 2002.

[63] S. Kotha, A. Ghosh, M. Behera

Synthesis of highly constrained unusual a-amino acid derivatives by the Diels–Alder approach.

Indian J. Chem. 41B, 2330, 2002.

[62] S. Kotha, A. K. Ghosh

Synthesis of highly functionalized 9, 10-diarylantharacens via bis Suzuki Miyaura coupling reaction.

Synlett 451, 2002.

[61] S. Kotha, R. Sivakumar, L. Damodharan, V. Pattabhi

Synthesis of two new hexaquinanes: Advanced C₂₀precursors to dodecahedrane

Tetrahedron Lett. 43, 4523, 2002.

[60] S. Kotha, M. Behera, R. Vinod Kumar

Synthesis of highly functionalized dibenzylglycine derivatives via the Suzuki-Miyaura coupling reaction.
Bioorg Med. Chem. Lett. 12, 105, 2002.

[59]      S. Kotha, S. Halder, L. Damodharan, V. Pattabhi
            First and unexpected synthesis of macrocyclic cyclophane-based unusual a-amino acid derivatives by
            phosphazene base without high dilution conditions.
            Bioorg Med. Chem. Lett. 12, 1113, 2002.

[58] S. Kotha, R. Stoodley

Enantioselective synthesis of (+)-4-demethoxy-1,4-dimethyldaunomycinone.

Bioorg Med. Chem 10, 621, 2002.

[57] S. Kotha, E. Brahmachary

Synthesis of constrained phenylalanine derivatives via a [2+2+2] cycloaddition strategy.
Bioorg Med. Chem. 10, 2291, 2002.

2001

[56]      S. Kotha, N. Sreenivasachary, E. Brahmachary
             Synthesis of benzocycloheptene-based amino acid derivatives via a [4+2] cycloaddition reaction as a key step.
            Tetrahedron 57, 6261, 2001.

[55]      S. Kotha, E. Brahmachary
             First synthesis of indane-based a-amino acid derivatives with crown ether side chain.
            Indian J. Chem. 40B, 1, 2001.

[54] L. Damodaran, K. Mohanraja, S. Kotha, S. Durani, V. Pattabhi

Conformational effects of C^a,a-dipropargylglycine as a constrained residue.
Biopolymers 59, 330, 2001.

[53]      S. Kotha, N. Sreenivasachary, E. Brahmachary
            Constrained phenylalanine derivatives by enyne metathesis and Diels–Alder reaction.
            Eur. J. Org. Chem. 787, 2001.

[52]      S. Kotha, N. Sreenivasachary
             Synthesis of 1, 2, 3, 4-tetrahydroioquinoline-3-carboxylic acid (Tic) derivatives by cycloaddition approaches.
            Eur. J. Org. Chem. 3375, 2001.

[51]      S. Kotha, E. Manivannan
            Synthesis of spiro-indanes by cycloaddition strategy.
            J. Chem. Soc. Perkin Trans. 1, 2543, 2001.

[50] S. Kotha, R. Sivakumar, E. Manivannan.
Allylation of bicyclo(3.3.0)octane-3,7-dione derivatives via fragmentation methodology.

Indian J. Chem. 40B, 1245, 2001.

[49] S. Kotha, K. Lahiri, N. Sreenivasachary

Synthesis of useful benzocyclobutene building blocks via the Suzuki Miyaura coupling reaction.
Synthesis 1932, 2001.

[48] P. K. Thallapally, K. Chakraborty, A. K. Katz, H. L. Carrell, S. Kotha, G. R. Desiraju

Matching of molecular and supramolecular symmetry. An exercise in crystal engineering.
CrystEngComm 31, 1, 2001

[47] S. Kotha, A. Tafesh, K. Davenport, P. Ortiz.

Synthesis and carbonylation of arylacetylenes.
Indian J. Chem. 40B, 1166, 2001.

[46] S. Kotha, K. Lahiri.

A new approach for modification of phenylalanine peptides by Suzuki Miyaura coupling reaction.
Bioorg Med. Chem. Lett. 11, 2887, 2001.

[45]      S. Kotha, N. Sreenivasachary, K. Mohanraja, S. Durani
            Modification of constrained peptides by ring-closing metathesis reaction.
            Bioorg Med. Chem. Lett. 11, 1421, 2001

[44] G. Mehta, S. Kotha

Recent chemistry of benzocyclobutenes.
Tetrahedron 57, 625, 2001.

[43] S. Kotha, N. Sreenivasachary.

Synthetic approaches to tetrahydroisoquinoline-3-carboxylic acid derivatives.

J. Indian. Inst. Sci. 81, 277, 2001.

[42] S. Kotha, N. Sreenivasachary

Catalytic metathesis in organic synthesis.

Indian J. Chem. 40B, 763, 2001.

2000

[41]      S. Kotha, E. Brahmachary
             Synthesis of indane-based unusual a-amino acid derivatives under phase-transfer catalysis conditions.
            J. Org. Chem. 65, 1359, 2000.

[40]      S. Kotha, K. Chakraborty
             Protection and deprotection sequence in tetracyclo[6.3.0.0^4,11.0.^5,9]undeca-2,7-dione system using tetrachlorosilane.
             Indian J. Chem. 39B, 382, 2000.

[39]      P.K. Thallapally, K. Charakborty, H. L. Carrell, S. Kotha, G. R. Desiraju
            Shape and size effects in crystal complexes of 1, 3, 5-trinitrobenzene with some trigonal donars: the
             benzene-thiophene exchange rule.
             Tetrahedron 56, 6721, 2000.

[38]      S. Kotha, N. Sreenivasachary
            A new synthetic approach to 1, 2, 3, 4-tetrahydroisoquinoline-3-carboxylic acid (Tic) derivatives via a
            [2+2+2] cycloaddition reaction.
            Bioorg Med. Chem. Lett. 10, 1413, 2000.

[37]      S. Kotha, T. Ganesh, A. Ghosh
             Diels-Alder approach to tetralin-based constrained a-amino acid derivatives.
             Bioorg Med. Chem. Lett. 10, 1755, 2000.

[36]      S. Kotha, S. Halder, E. Brahmachary, T. Ganesh
             Synthesis of unusual a-amino acid derivatives via cross enyne metathesis reaction.
            Synlett 853, 2000.

[35]      S. Kotha, N. Sreenivasachary
            A new synthetic approach to 1, 2, 3, 4-tetrahydroisquinoline-3-carboxylic acid (Tic) derivatives via enyne
             metathesis and the Diels–Alder reaction.
            Chem. Commun. 503, 2000.

[34]      S. Kotha, K. Mohanraja, S. Durani
            Constrained phenylalanine peptides via a [2+2+2]-cycloaddition strategy
            Chem. Commun. 1909, 2000.

1999

[33]      S. Kotha, N. Sreenivasachary, S. Halder
             First synthesis of benzocyclobutene and biphenylene based unusual a-amino acid derivatives.
             Bioorg Med. Chem. Lett. 9, 2565, 1999.

[32]      S. Kotha, E. Manivannan, N. Sreenivasachary, T. Ganesh, A. C. Deb
            Spiro-annulation via ring-closing metathesis reaction.
            Synlett 1618, 1999.

[31]      S. Kotha, K. Chakraborty, E. Brahmachary
            A general and simple method for the synthesis of star-shaped thiophene derivatives.
            Synlett 1621, 1999.

[30]      S. Kotha, E. Manivannan, N. Sreenivasachary
            Allylation of caged diketones via fragmentation methodology
           J. Chem. Soc. Perkin Trans. 1, 2845, 1999.

1998

[29]      S. Kotha, N. Sreenivasachary, E. Brahmachary
            Synthesis of constrained a-amino acid derivatives via enyne-metathesis reaction.
           Tetrahedron Lett. 39, 2805, 1998.

[28]      S. Kotha, E. Brahmachary, N. Sreenivasachary.
            Synthesis of constrained a-amino acid derivatives via Diels-Alder approach.
           Tetrahedron Lett. 39, 4095, 1998.

[27]      S. Kotha, N. Sreenivasachary
            Synthesis of constrained a-amino acid derivatives via ring-closing olefin metathesis.
           Bioorg Med. Chem. Lett. 8, 257, 1998.

[26]      S. Kotha, A. Joseph, R. Sivakumar, E. Manivannan
             Large scale synthesis of dimethyl 1, 3-acetonedicarboxylate.
             Indian J. Chem. 37B, 397, 1998.

1997

[25]      S. Kotha, E. Brahmachary
            Synthesis of unusual a-amino acids via a [2+2+2] cycloaddition strategy.
            Tetrahedron Lett. 38, 3561, 1997.

[24] S. Kotha, E. Brahmachary, R. Sivakumar, A. Joseph, N. Sreenivasachary

A simple route to cyclopentane annulation.
Tetrahedron Lett. 38, 4497, 1997.

[23]      S. Kotha, E. Brahmachary, A. Kuki, D. Anglos, K. Lang, B. Singaram, W. Crisman
             Synthesis of a novel constrained a-amino acid with quinoxaline side-chain:
             7-Amino-6, 7-dihydro-8H-cyclopenta[g]quinoxaline-7-carboxylic acid.
            Tetrahedron Lett. 38, 9031, 1997.

[22]      S. Kotha, E. Brahmachary
            Synthesis of conformationally constrained a-amino acid derivatives using ethyl isocyanoacetate as a glycine equivalent.
            Bioorg Med. Chem. Lett. 7, 2719, 1997.

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