An efficient nickel-catalyzed formal [3 + 2]-cycloaddition of 2H-azirines with 1,3-dicarbonylcompounds for the synthesis of tetrasubstituted pyrroles has been developed. This transformation involves cleavage of the CN double bond and the construction of new CC and CN bonds. The reaction employs readily available starting materials, tolerates a wide range of functional groups, and affords tetrasubstituted
Molybdate sulfuric acid as a reusable solid catalyst in the synthesis of 2,3,4,5-tetrasubstituted pyrroles via a new one-pot [2+2+1] strategy
作者:Fatemeh Tamaddon、Mahnaz Farahi、Bahador Karami
DOI:10.1016/j.molcata.2012.01.003
日期:2012.4
Molybdatesulfuricacid (MSA) has been found as an efficient and reusable solid acid catalyst for the synthesis of new 2,3,4,5-tetrasubstituted pyrroles via a novel [2+2+1] strategy. Thus, one-pot three-component reaction of benzoin derivatives, 1,3-dicarbonyls, and ammonium acetate afforded the desired products in high yield under solvent-free conditions.