Cyclization of rhodium carbenoids using ester and amido carbonyl groups
作者:Erin A. Curtis、Kimberly J. Worsencroft、Albert Padwa
DOI:10.1016/s0040-4039(97)00617-5
日期:1997.5
Carbonyl ylide dipoles derived from diazoacetyl esters underwent 4 pi-electrocyclization to furnish bicyclic epoxides. Reaction of related alpha-diazoketo amides with rhodium(II) carboxylate catalysts resulted in cyclization on both the oxygen and nitrogen atoms of the amido group to give carbonyl and ammonium ylides. (C) 1997 Elsevier Science Ltd.