Intramolecular Diels–Alder Reaction of a Silyl-Substituted Vinylimidazole en Route to the Fully Substituted Cyclopentane Core of Oroidin Dimers
作者:Abhisek Ray、Muhammed Yousufuddin、Delphine Gout、Carl J. Lovely
DOI:10.1021/acs.orglett.8b02675
日期:2018.9.21
An intramolecular Diels–Alder reaction of a silyl-substituted vinylimidazole delivers a diastereomeric mixture of C4-silyl functionalized dihydrobenzimidazoles. Subsequent diastereoselective reduction and elaboration of the lactone gives rise to a polysubstituted tetrahydrobenzimidazole, which, upon oxidative rearrangement, affords a single spirofused imidazolone containing all of the relevant functionality
甲硅烷基取代的乙烯基咪唑的分子内Diels-Alder反应产生C4-甲硅烷基官能化的二氢苯并咪唑的非对映异构体混合物。随后的非对映体选择性还原和精制内酯产生了多取代的四氢苯并咪唑,其经氧化重排后,提供了一种单螺旋稠合的咪唑啉酮,其包含所有相关功能,可用于类固醇二聚体二乙酰氨基胺,马萨定和帕劳胺。