Weinreb 3-(pyrrolidin-2-ylidene)propionamides and Weinreb N-vinylprolinamides were used for the synthesis of 2,3-dihydropyrrolizines. The selective reaction of the carboxamide group with organometallic compounds allowed us to obtain a great variety of carbonyl intermediates, analogous to the Hantzsch and Knorr pyrrole synthesis, which were thermally cyclized.
Weinreb 3-(
吡咯烷-2-亚基)丙酰胺和Weinreb N-
乙烯基脯
氨酰胺被用于合成2,3-二氢
吡咯嗪。羧酰胺基团与有机
金属化合物的选择性反应使我们能够获得多种类似于Hantzsch和Knorr
吡咯合成中的羰基中间体,这些中间体在热力作用下环化。