N-acylimidates are readily silylated with t-butyldimethylsilyl triflate in the presence of triethylamine to give 2-aza-1,3-dienes . These react with activated nitriles to yield pyrimidin-4-ones .
A general approach for the synthesis of 1-(N-acylamino)-1-triphenylphosphoniumalkylphosphonates from readily accessible alkyl imidate hydrochlorides has been developed. The three-step synthesis involves acylation of the imidate hydrochloride with an acyl chloride, the Michaelis–Becker-like addition of diethyl phosphite to the N–acylimidate and subsequent nucleophilic substitution of the ethoxy group
A New Access to 2,3-Dihydro Imidazo [1,2-c] Pyrimidines
作者:Mustapha Rahmouni、Aïcha Derdour、Jean Pierre Bazureau、Jack Hamelin
DOI:10.1080/00397919608003636
日期:1996.2
Abstract A simple and efficient route to 2,3-dihydro imidazo [1,2-c] pyrimidines 3(a-e) by reaction under focused microwave irradiation of N-Acyl imidates 1 with imidazolidine ketene aminals 2 is described.
Novel compounds, e.g., N-(5,7-dimethyl-1,2,4-triazolo[1,5-a]-1,3,5-triazin-2-yl)-(2-chlorobenzene sulfonamide) and their compositions and use in the control of weeds.