Versatile [3 + 2] methylenecyclopentane annulations of unactivated and electron-rich olefins with [(trimethylsilyl)methylene]cyclopropanedicarboxylates
摘要:
[(Trimethylsilyl)methylene] cyclopropanedicarboxylates 8a-e are readily available from the cyclopropanation of the silylallenes 7a-e with dimethyl diazomalonate. The free-radical mediated methylenecyclopentane annulations of unactivated and electron-rich alkenes with 8a-e proceed in high yield. The product vinylsilanes are set up for diverse secondary conversions, making annulations with 8a-e highly versatile in the synthesis of cyclopentanes.
Huval Chad C., Singleton Daniel A., J. Org. Chem., 59 (1994) N 8, S 2020-2024
作者:Huval Chad C., Singleton Daniel A.
DOI:——
日期:——
Versatile [3 + 2] methylenecyclopentane annulations of unactivated and electron-rich olefins with [(trimethylsilyl)methylene]cyclopropanedicarboxylates
作者:Chad C. Huval、Daniel A. Singleton
DOI:10.1021/jo00087a015
日期:1994.4
[(Trimethylsilyl)methylene] cyclopropanedicarboxylates 8a-e are readily available from the cyclopropanation of the silylallenes 7a-e with dimethyl diazomalonate. The free-radical mediated methylenecyclopentane annulations of unactivated and electron-rich alkenes with 8a-e proceed in high yield. The product vinylsilanes are set up for diverse secondary conversions, making annulations with 8a-e highly versatile in the synthesis of cyclopentanes.