Unexpected formation of 5-alkylidene derivatives of hydantoin from the Michael addition of 4-phenylurazole to fumaric esters
作者:Zahra Soltanzadeh、Gholamhassan Imanzadeh、Nader Noroozi-Pesyan、Ertan Şahin、Hemayat Hooshmand
DOI:10.1016/j.tet.2016.02.024
日期:2016.4
An unexpected reaction between 4-phenylurazole and fumaric esters which led to the formation of 5-alkylidene derivatives of hydantoin is described in this paper. The reaction takes place in the presence of tetrabutylammonium bromide (TBAB), and 1,4-diaza-bicyclo[2,2,2]octane (DABCO) at 70 °C under solvent-free conditions.
本文描述了4-苯基脲和富马酸酯之间的意外反应,该反应导致乙内酰脲的5-亚烷基衍生物的形成。反应在无溶剂条件下,在四丁基溴化铵(TBAB)和1,4-二氮杂双环[2,2,2]辛烷(DABCO)的存在下于70°C进行。