以2-溴苯胺和氰乙酸为原料,经N-烷基化、酰胺化和α-烷基化反应合成了4种新型的N-甲基-N-(2-溴苯基)-2-取代基-2-氰基酰胺类化合物(5a ~5d),其结构经1H NMR,13C NMR和HR-MS表征.在最佳反应条件[N-甲基-N-(2-溴苯基)-2-氰基乙酰胺(3)1.7 mmol,n(3)∶n(溴乙烷)=1∶1,DMF为溶剂,Cs2CO3为碱,于室温反应6h]下,5a收率83%.
Four novel 2-cyano-2-substituted-N-methyl-N-(2-bromophenyl) acetamides (5a ~ 5d) were synthesized by N-alkylation,amidation and then α-alkylation using 2-bromoaniline and cyanoacetic acid as the raw materials.The structures were characterized by 1H NMR,13C NMR and HRMS.The yield of 5a was 83% under optimum reaction conditions[2-cyano-N-methyl-N-(2-bromophenyl) acetate amide (3) 1.7 mmol,n (3) ∶ n (bromoethane) =1 ∶ 1,DMF was the solvent and Cs2CO3 was the base,at room temperature for 6 h].