Reactions with 4-Hydroxy-2-methylbutananilides: Unexpected Formation of a Cyclopropanecarboxamide
作者:Maged K. G. Mekhael、Anthony Linden、Heinz Heimgartner
DOI:10.1002/hlca.201000370
日期:2011.1
1‐methylcyclopropanecarboxamide 10 in good yield. This base‐catalyzed cyclization offers a new approach to cyclopropanecarboxamides. Under similar conditions, the N‐monosubstituted 4‐hydroxy‐2‐methylbutanamide 2b gave the 3‐methylpyrrolidin‐2‐one 11. The structure of the cyclopropanecarboxamide 10 was established by X‐ray crystallography.
用二异丙基氨基锂(LDA)和二氯磷酸二苯酯(DPPC1)连续处理N,N-二取代的4-羟基-2-甲基丁酰胺2a导致1-甲基环丙烷甲酰胺10的收率很高。这种碱催化的环化为环丙烷甲酰胺提供了一种新方法。在相似的条件下,N-单取代的4-羟基-2-甲基丁酰胺2b给出了3-甲基吡咯烷酮-2-酮11。X射线晶体学确定了环丙烷甲酰胺10的结构。