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Studies directed toward the synthesis of hedycoropyrans: total synthesis of des-hydroxy (−)-hedycoropyran B (ent-rhoiptelol B)†
Rajesh Nomula
Organic & Biomolecular Chemistry Pub Date : 12/02/2021 00:00:00 , DOI:10.1039/D1OB01972D
Abstract

A full account of our efforts directed towards the synthesis of the diarylheptanoid-derived natural products hedycoropyrans that led to the total synthesis of ent-rhoiptelol B is described. In this endeavor, we have attempted two distinct synthetic strategies to access hedycoropyrans A and B, which led us to establish a facile synthetic route for des-hydroxy (−)-hedycoropyran B (ent-rhoiptelol B) from simple and readily accessible building blocks of 4-allylanisole and vanillin, employing Sharpless asymmetric epoxidation, CBS reduction, and an intramolecular AgOTf-catalyzed oxa-Michael reaction of suitably functionalized hydroxy-ynone as key transformations. The investigations disclosed herein will provide insights into designing novel synthetic routes for THP-DAH-derived natural products.

Graphical abstract: Studies directed toward the synthesis of hedycoropyrans: total synthesis of des-hydroxy (−)-hedycoropyran B (ent-rhoiptelol B)
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