Microwave irradiation: a green approach for the synthesis of functionalized<i>N</i>-methyl-1,4-dihydropyridines
作者:M. Musawwer Khan、Saigal Saigal、Sarfaraz Khan、Sumbulunnisan Shareef、Subash C. Sahoo
DOI:10.1039/c8ra09155b
日期:——
developed for the synthesis of diverse functionalized N-methyl-1,4-dihydropyridines (1,4-DHPs). This pseudo three-component reaction was carried out between two equivalents of (E)-N-methyl-1-(methylthio)-2-nitroethenamine (NMSM) and one equivalent of aromaticaldehydesundermicrowaveirradiation at 100 °C without catalyst and solvent. Short reaction times, avoidance of toxic solvents or expensive, metallic
已开发出一种环保且具有成本效益的微波辅助绿色方法,用于合成多种功能化的N-甲基-1,4-二氢吡啶 (1,4-DHP)。这种假三组分反应是在 100 °C 微波照射下,在两当量 ( E ) -N-甲基-1-(甲硫基)-2-硝基乙烯胺 (NMSM) 和一当量芳香醛之间进行的,无需催化剂和溶剂. 反应时间短、避免使用有毒溶剂或昂贵的金属和腐蚀性催化剂以及不需要柱色谱纯化是所提出方法的宝贵特征。此外,该方法的“绿色”在已定义的绿色指标范围内进行评估,例如原子经济、碳效率、E-因子、反应质量效率、总效率、工艺质量强度和溶剂强度以及该方法表现出良好至优异的得分。