One pot synthesis using supported reagents system KSCN/SiO2–RNH3OAc/Al2O3: synthesis of 2-aminothiazoles and N-allylthioureas
作者:Tadashi Aoyama、Sumiko Murata、Izumi Arai、Natsumi Araki、Toshio Takido、Yoshitada Suzuki、Mitsuo Kodomari
DOI:10.1016/j.tet.2006.01.075
日期:2006.4
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.