1-Chloroalkyl isocyanates and 1-chloroalkylcarbodiimides undergo regioselective cyclization with nitriles and esters of 2-benzimidazolylacetic acid to give derivatives of 1-oxo and 1-arylimino-1,2,3,5-tetrahydrobenzo[4,5]imidazo[1,2-c]pyrimidine respectively. The cyclocondensation of 1,1-dichloroalkyl isocyanates or N-(1-chloroalkylidene)carbamates with nitriles and esters of 2-benzimidazolylacetic acid afforded 1,5-dihydrobenzo[4,5]imidazo[1,2-c]pyrimidin-1-one derivatives.
1-
氯烷基
异氰酸酯和 1-
氯烷基碳二
亚胺与 2-
苯并咪唑乙酸的腈类和
酯类发生区域选择性环化反应,分别生成 1-氧代和 1-芳基亚
氨基-1,2,3,5-四氢苯并[4,5]
咪唑并[1,2-c]
嘧啶的衍
生物。1,1-
二氯烷基
异氰酸酯或 N-(1-
氯亚烷基)
氨基甲酸酯与腈类和 2-
苯并咪唑乙酸酯的环缩合反应得到了 1,5-二氢苯并[4,5]
咪唑并[1,2-c]
嘧啶-1-酮衍
生物。