Synthesis of 2,3-dihydropyrazolo[5,1-<i>b</i>]thiazoles<i>via</i>a tandem condensation sulfur-extrusion reaction
作者:Wolfgang Hanefeld、Martin Schlitzer
DOI:10.1002/jhet.5570310675
日期:1994.11
2,3-Dihydropyrazolo[5,1-b]thiazoles 3 are the first representatives of a heterocyclic system, which are conveniently prepared by heating 3-aminorhodanines 1 with ethyl 2-bromo-3,3-diethoxypropionate (2), via a tandem condensation-sulfur extrusion reaction.
2,3-二氢吡[5,1- b ]噻唑类3是杂环系统的第一代表,其可方便地通过加热制备的3- aminorhodanines 1与2-溴-3,3- diethoxypropionate(2),经由一串联缩合-硫挤出反应。