was developed through a sequence involving O-vinylation of allyl alcohols followed by Claisen rearrangement and further ozonolysis, concurring in a Paal–Knorr reaction with primary amines. Hg(II) and Ir(I) catalysts and different vinylating reagents were tested. The best results were consistently obtained with the [Ir(cod)Cl]2–vinyl acetate system. The featured methodology gives access to functionalized
A new synthesis of monosubstituted succinaldehydes and 3-substituted pyrroles from acetonitriles. Formal synthesis of 2,3-dihydro-7-methyl-2H-pyrrolizidin-1-one (Danaidone), a semiochemical of danaid butterflies
作者:Jose Manuel Méndez、Blas Flores、Fernando León、María Eugenia Martínez、Alfredo Vázquez、Gustavo Alberto García、Manuel Salmón
DOI:10.1016/0040-4039(96)00765-4
日期:1996.6
A convenient and versatile synthesis of monosubstitutedsuccinaldehydes and 3-substitutedpyrrolesfromacetonitriles was devised. The methodology was applied to the preparation of , the penultimate intermediate in the Meinwald and Meinwald synthesis of Danaidone.12
Palladium-Catalyzed Annulation of Aryl Heterocycles with Strained Alkenes
作者:David G. Hulcoop、Mark Lautens
DOI:10.1021/ol070475w
日期:2007.4.1
An annulation reaction proceeding by the intermolecular addition of an arylpalladium(II) halide across a strained alkene, followed by an intramolecular C-H functionalization of a pendant heterocycle is described. A variety of polycyclic heterocycles have been prepared from readily accessible haloaryl heterocycles by annulation with a range of strained alkene partners.
Engels,R.; Schaefer,H.J., Angewandte Chemie, 1978, vol. 90, p. 483