1,2-Dihydropentalenes from Fulvenes by [6 + 2] Cycloadditions with 1-Isopropenylpyrrolidine
作者:Necdet Coşkun、Jingxiang Ma、Saeed Azimi、Christian Gärtner、Ihsan Erden
DOI:10.1021/ol202222d
日期:2011.11.18
In situ generated acetone pyrrolidine enamine undergoes [6 + 2] cycloadditions with fulvenes to give 1,2-dihydropentalenes. This ring annulation method works particularly well with 6-monosubstituted fulvenes and is subject to steric hindrance at C-6 of the fulvene. On the basis of mechanistic studies, optimal conditions have been developed for a one-pot synthesis of 1,2-dihydropentalenes using catalytic
原位生成的丙酮吡咯烷烯胺与富烯进行 [6 + 2] 环加成生成 1,2-二氢戊烯。这种成环方法特别适用于 6-单取代的富烯,并且在富烯的 C-6 处受到空间位阻。在机理研究的基础上,已开发出使用催化量的吡咯烷一锅法合成 1,2-二氢戊烯的最佳条件。