作者:G.C. Barrett、R. Walker
DOI:10.1016/s0040-4020(01)93773-1
日期:1976.1
4-substituted 2-phenylthiazol-5(4H)-one and an electron-deficient alkene is shown to include a stable cycloadduct and a Michael adduct formed through the 2- or the 4-position of the thiazolone. The reaction can be diverted towards the Michael adduct entirely, by adding traces of aqueous alkali to the reactants in acetone solution. A novel type of 1:2-adduct is present in the reaction mixture, and is shown to
在温和条件下在4-取代的2-苯基噻唑-5(4H)-1和缺电子的烯烃之间形成的加合物的混合物显示包括稳定的环加合物和通过2-或4-位形成的Michael加合物噻唑酮。通过在丙酮溶液中向反应物中添加痕量碱金属水溶液,可将反应完全转移至迈克尔加合物。反应混合物中存在一种新型的1:2-加合物,并且显示是通过环加合物与烯烃的反应而形成的。由环加合物挤出羰基硫形成的产物与由类似的恶唑酮和烯烃得到的产物相同,