Abstract
Weinreb 3-(pyrrolidin-2-ylidene)propionamides and Weinreh N-vinylprolinamides were used for the synthesis of 2,3-di-hydropyrrolizines. 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.
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