A Facile Synthesis of Dialkoxycarbonylketene-, Dicyanoketene-, and Alkoxycarbonyl(cyano)ketene Ethylene Acetals
作者:Richard Neidlein、Daniel Kikelj
DOI:10.1055/s-1988-27775
日期:——
Dicyanoketene-, dialkoxycarbonylketene- and alkoxycarbonyl(cyano) ketene ethylene acetals can be conveniently prepared by reaction of malononitrile, dialkyl malonates and alkyl cyanoacetates with 2-chloroethyl chloroformate.
Heterocyclen aus Bis(alkoxycarbonyl)keten-ethylen-acetalen ( = Dialkyl-2-(1,3-dioxolan-2-yliden)propan-1,3-dioate). Synthese und Eigenschaften einer neuen Klasse von Pyrazolium-Betainen
Heterocycles Starting from Bis(alkoxycarbonyl)ketene Ethylene Acetals ( = Dialkyl 2-(1,3-Dioxolan-2-ylidene)propane-1,3-dioate). Synthesis and Properties of a New Class of Pyrazolium Betaines