Cyclization of ethyl ylidenecyanoacetates to carbocyclic o-aminoesters
作者:Janusz SepioŁ
DOI:10.1016/s0040-4020(01)87460-3
日期:1986.1
Ethyl ylidenecyanoacetates undergo cyclization in cold sulfuric acid to give the lactone and o-aminoester . The key o-aminoester is used to the synthesis of a variety of as-hydrindacene derivatives including o-aminocarboxylic acid , o-hydroxyester , o-hydroxycarboxylic acid , or the ester .