Conjugate allylation reactions of alkylidene malononitriles mediated by NHC-ligated palladium catalysts
摘要:
Conjugate allylation of malononitriles is reported using catalytic N-heterocyclic carbene-ligated palladium complexes. This conjugate allylation reaction yields a variety of monoallylated products. These results contrast the bis-allylation of malononitriles using other palladium-based catalysts. This reaction tolerates a wide variety of functional groups including aryl groups, heteroaromatics, and aliphatic substituents to provide the desired products in good to excellent yields. Derivativation of the monoallylation products to form a triamino pyrimidine is demonstrated. (C) 2008 Elsevier Ltd. All rights reserved.
Conjugate allylation reactions of alkylidene malononitriles mediated by NHC-ligated palladium catalysts
作者:Joshua D. Waetzig、Elizabeth C. Swift、Elizabeth R. Jarvo
DOI:10.1016/j.tet.2008.10.061
日期:2009.4
Conjugate allylation of malononitriles is reported using catalytic N-heterocyclic carbene-ligated palladium complexes. This conjugate allylation reaction yields a variety of monoallylated products. These results contrast the bis-allylation of malononitriles using other palladium-based catalysts. This reaction tolerates a wide variety of functional groups including aryl groups, heteroaromatics, and aliphatic substituents to provide the desired products in good to excellent yields. Derivativation of the monoallylation products to form a triamino pyrimidine is demonstrated. (C) 2008 Elsevier Ltd. All rights reserved.