Speaker: Prof. Santanu Mukherjee
Department of Organic Chemistry
Indian Institute of Science, Bangalore - 560012,
INDIA
Title: "Symmetry Breaking Routes to (Un)Natural Ladderanes
and Beyond".
Day and Date: Friday, May 08, 2026
Time: 11.30 am.
Venue: Room no. 350, Chemistry Department
Second floor, Annex
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Hosted by Prof. Debabrata Maiti
Abstract Breaking symmetry to generate asymmetry, commonly termed desymmetrization, is a remarkably
powerful strategy for building molecular complexity. During the past few years, we have developed
a number of organocatalytic enantioselective desymmetrization reactions including formal C(sp2)‒H
alkylation1 and de novo construction of (hetero)arenes.2 We subsequently applied these reactions to
the enantioselective synthesis complex targets.
Naturally occurring ladderane phospholipids represent such target, which provided us with the
motivation to develop some of these enantioselective desymmetrization reactions. This talk will focus
on the application of our desymmetrizing C(sp2)‒H alkylation reaction to [3]-ladderanol,3[5]-ladderanoic4
acid as well as their unnatural analogues in an effort to unravel their biosynthetic hypothesis. In addition, our recent work on the enantioselective synthesis of an unnatural benzoanalogue of [3]-ladderanol through the application of our newly developed alkoxy-directed dienamine catalysis5 will also be discussed.