Isocyanide-based multicomponent reactions: synthesis of 2-(1-(alkylcarbamoyl)-2,2-dicyanoethyl)-N-alkylbenzamide and 1,7-diazaspiro[4,4]nonane-2,4-dione derivatives
作者:Ebrahim Soleimani、Mohsen Zainali、Neda Ghasemi、Behrouz Notash
DOI:10.1016/j.tet.2013.09.011
日期:2013.11
A four-component reaction between 2-formylbenzoic acid, malononitrile, isocyanides, and primary alkyl amines has been developed for an efficient preparation of 2-(1-(alkylcarbamoyl)-2,2-dicyanoethyl)-N-alkylbenzamide and 1,7-diazaspiro[4,4]nonane-2,6-dione derivatives under two different conditions. It is shown that simply by changing the reaction solvent from ethanol to dichloromethane and controlling
之间2-甲酰基苯甲酸,丙二腈,异腈,和伯烷基胺的四组分反应已发展为2-高效的制备(1-(烷基氨基甲酰基)-2,2-二氰) - ñ -alkylbenzamide和1,7- -二氮杂螺[4,4]壬烷-2,6-二酮衍生物在两个不同的条件下。结果表明,仅通过将反应溶剂从乙醇变成二氯甲烷并控制试剂的添加顺序,就可以得到两种完全不同的产物。这些多组分反应显示出高原子经济性。