Superbase catalysis of oxazolidin-2-one ring formation from carbon dioxide and prop-2-yn-1-amines under homogeneous or heterogenous conditions
作者:Mirco Costa、Gian Paolo Chiusoli、Davide Taffurelli、Giulio Dalmonego
DOI:10.1039/a800453f
日期:——
N-alkyl-substituted prop-2-yn-1-amines and N-tri-, tetra- and penta-alkyl-substituted guanidines or other strong organic bases assemble under the action of carbon dioxide to afford carbamates, from which methyleneoxazolidinones 2 are formed by ring closure. If alkyl or cycloalkyl chains of appropriate length are present in the guanidines the reaction readily occurs under heterogenous conditions without
N-烷基取代的丙-2-炔-1-胺和N-三,四和五烷基取代的胍或其他强有机碱在二氧化碳的作用下组装,以提供氨基甲酸酯,由氨基甲酸酯生成亚甲基恶唑烷酮2由闭环形成。如果胍中存在适当长度的烷基或环烷基链,则该反应在非溶剂条件下容易在非均相条件下发生。