A Stereoselective Photoinduced Cycloisomerization Inspired by Ophiobolin A
作者:James A. Law、Daniel P. Callen、Elena L. Paola、Gabe Gomes、James H. Frederich
DOI:10.1021/acs.orglett.2c02272
日期:2022.9.16
A stereoselective synthetic entry point to the 5–8–5 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
开发了 ophiobolins 5-8-5 碳环核心的立体选择性合成入口点。该策略利用 ophiobolin A 的手性叔醇通过光引发环异构化一步引导 5-8-5 支架的组装。描述了对该反应中立体控制起源的机制见解,以及将所得的 5-8-5 环稠合系统与 ophiobolin A 药效团详细阐述的努力。
Fully Biocatalytic Rearrangement of Furans to Spirolactones
作者:Yu-Chang Liu、J. D. Rolfes、Joel Björklund、Jan Deska
DOI:10.1021/acscatal.3c00132
日期:2023.6.2
building blocks. In a streamlined one-pot reaction cascade, the combination of chloroperoxidase, an oxidase, and an alcohol dehydrogenase renders an efficient reaction cascade for the conversion of hydroxy-functionalized furans to the spirocyclic products. The fully biocatalytic method is successfully employed in the totalsynthesis of the bioactive naturalproduct (+)-crassalactone D, and as the key