A simple and efficient method has been developed for the synthesis of 2-aminothiazoles and N-allylthioureas from commercially available materials in one pot by using a supported reagents system, KSCN/SiO2-RNH3OAc/Al2O3, in which alpha-halo ketone reacts first KSCN/SiO2 and the product, alpha.-thiocyanatoketone, reacts with RNH3OAc/Al2O3 to give the final product, 2-aminothiazoles, in good yield and allyl bromide reacts with KSCN/SiO2 and the product, allyl isothiocyanate, reacts with RNH3OAc/Al2O3 to give N-allylthiourea. (c) 2006 Elsevier Ltd. All rights reserved.
Direct N-alkylation of amino-azoles with alcohols catalyzed by an iridium complex/base system
作者:Feng Li、Haixia Shan、Lin Chen、Qikai Kang、Po Zou
DOI:10.1039/c1cc14861c
日期:——
The direct and regioselective N-alkylation of amino-azoles to the corresponding 2-N-(alkylamino)azoles using various alcohols as alkylating agents with good to excellent yields has been accomplished by an iridium complex/base system.