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A Stereoselective Photoinduced Cycloisomerization Inspired by Ophiobolin A
Journal article   Peer reviewed

A Stereoselective Photoinduced Cycloisomerization Inspired by Ophiobolin A

James A. Law, Daniel P. Callen, Elena L. Paola, Gabe Gomes and James H. Frederich
Organic letters, Vol.24(36), pp.6499-6504
09/16/2022
PMCID: PMC10559756
PMID: 35944279
Web of Science ID: WOS:000841457900001

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Abstract

Alcohols Ketones Ethers Hydrocarbons Isomerization Chemical Sciences
A stereoselective synthetic entry point to the 5-8-carbocyclic core of the ophiobolins was developed. This strategy exploits the chiral tertiary alcohol of ophiobolin A to guide assmebly of the 5-8-5 scaffold in a single step via a photoinitiated cycloisomerization. Mechanistic insights into the origin of stereocontrol in this reaction are described, as are efforts to elaborate the resultant fused 5-8-5 ring system to the pharmacophore of ophiobolin A.

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