A Highly Flexible and Efficient Ugi-Type Multicomponent Synthesis of Versatile N-Fused Aminoimidazoles
作者:Sankar Guchhait、Chetna Madaan、Balmukund Thakkar
DOI:10.1055/s-0029-1216916
日期:2009.10
A microwave-promoted highly flexible and efficient Ugi-type multicomponent reaction of heterocyclic amidines with aldehydes and isocyanides catalyzed by zirconium(IV) chloride was developed. The general protocol offered the very reliable synthesis of a library of medicinally important, widely versatile N-fused aminoimidazoles in excellent yields. Poorly reactive heterocyclic amidines, functionally
研究了微波促进的高柔性,高效的Ugi型杂环multi与氯化锆(IV)催化的醛和异氰酸酯的多组分反应。该通用方案以极高的收率提供了非常重要的医学上重要的,用途广泛的N融合氨基咪唑库的可靠合成。在较早描述的方法中作为麻烦的反应物遭受的反应性差的杂环am,功能和空间受阻的醛在该方法中被认为是可行的底物。发现ZrCl 4的有效催化以及微波辐照的作用对于获得方案的优异灵活性和效率至关重要。 多组分反应-N-杂环-催化-氯化锆-微波