PHOSPHONIUM YLIDE-CATALYZED CYCLOTRIMERIZATION OF ETHYL PROPYNOATE
摘要:
The cyclotrimerization of ethyl propynoate (2) to yield aromatic triesters is shown to proceed via consecutive [2+2] cycloadditions of ethoxycarbonylmethylenetriphenylphosphonium ylide (1) to three moles of (2), followed by cyclization and elimination of (1).
PHOSPHONIUM YLIDE-CATALYZED CYCLOTRIMERIZATION OF ETHYL PROPYNOATE
作者:A. Johan H. Labuschagne、Johan S. Malherbe、Cornelius J. Meyer、David F. Schneider
DOI:10.1081/scc-120002015
日期:2002.1
The cyclotrimerization of ethyl propynoate (2) to yield aromatic triesters is shown to proceed via consecutive [2+2] cycloadditions of ethoxycarbonylmethylenetriphenylphosphonium ylide (1) to three moles of (2), followed by cyclization and elimination of (1).