Stereoselective Synthesis of 2-Dienyl-Substituted Pyrrolidines Using an η4-Dienetricarbonyliron Complex as the Stereodirecting Element: Elaboration to the Pyrrolizidine Skeleton
摘要:
Primary amines react with keto-aldehyde functionality located in the side-chain of an eta(4)-dienetricarbonyliron complex to provide the corresponding pyrrolidines in excellent diastereoselectivity. Two of the pyrrolidine products, 1i and 1k, have been elaborated into pyrrolizidines using a 1,5-C-H insertion and radical cyclization strategy, respectively.
Stereoselective synthesis of 2-dienyl-substituted piperidines using an η4-dienetricarbonyliron complex as the stereocontrolling element in a double reductive amination cascade