Tetrabutylammonium Bromide Media Aza-Michael Addition of 1,2,3,6-Tetrahydrophthalimide to Symmetrical Fumaric Esters and Acrylic Esters under Solvent-Free Conditions
作者:Gholamhassan Imanzadeh、Farzaneh Ahmadi、Mohammadreza Zamanloo、Yagoub Mansoori
DOI:10.3390/molecules15107353
日期:——
The aza-Michael addition of 1,2,3,6-tetrahydrophthalimide with symmetrical fumaric esters has been performed efficiently in a solvent-free system at 100 °C and using 1,4-diazabicyclo[2.2.2]octane (DABCO) as a base in the presence of tetrabutylammonium bromide (TBAB). The products were obtained in good to high yields within 2.5-7.0 h. This reaction worked well on linear alkyl fumarates and was not effective
1,2,3,6-四氢邻苯二甲酰亚胺与对称富马酸酯的氮杂-迈克尔加成已在100°C的无溶剂系统中有效进行,并使用1,4-二氮杂双环[2.2.2]辛烷(DABCO)作为在四丁基溴化铵 (TBAB) 存在下的碱。在 2.5-7.0 小时内以良好到高产率获得产品。该反应对线性富马酸烷基酯效果良好,但对非线性富马酸烷基酯无效。尽管该反应也适用于丙烯酸酯,例如丙烯酸正丁酯,但甲基丙烯酸酯和巴豆酸酯不适合该反应的迈克尔受体。