A short and efficient one-pot synthesis of uracil derivatives with a high structural variability is described. The process is a multicomponent reaction based on a palladium-catalyzed carbonylation of α-chloroketones in the presence of primary amines and isocyanates. In most cases, when the formation of unsymmetrical N,N′-disubstituted uracil derivatives can occur, the methodology demonstrates to be
Preparation and reactions of 2-zincated 2-cyclohexen-1-one and related heterocycles
作者:A.S Bhanu Prasad、Paul Knochel
DOI:10.1016/s0040-4020(97)10116-8
日期:1997.12
of a copper(I) catalyst or palladium(0) catalyst with an allylic bromide or alkenyl and aryliodides in satisfactory to good yields. Several of these products can further be cyclized leading diastereoselectively to a polyfunctional decaline 12 or a pyrrole derivative 13. A 6-zincated uracil reagent has also been prepared and reacted with aryliodides in the presence of a palladiumcatalyst leading to