Synthesis of ureas, amidines, and guanidines of the pyhimido[1,2-a]benzimidazole series
摘要:
The reaction of derivatives of 2-aminopyrimido[1,2-a]benzimidazole (APB) with isocyanates or dimethylacetamide dimethylacetals yielded ureas and amidines of the title series. The corresponding guanidines were synthesized by reaction of borylated APB with carbodiimides via boron chelates.