for the synthesis of 2-aminobenzothiazoles by copper-catalyzedtandemreaction has been developed. In the presence of CuBr and Cs 2 CO 3 , a variety of 2-haloanilines underwent the reaction with tetramethylthiuram disulfide (TMTD) efficiently to afford the corresponding 2-aminobenzothiazoles in moderate to excellent yields. The present process allows the construction of 2-aminobenzothiazoles from a
ABSTRACT A simple and efficient protocol for the synthesis of 2-aminobenzothiazoles by a ligand-free copper-catalyzed tandemreaction has been developed. In the presence of CuBr and t-BuOK, a variety of 2-haloanilines (halogen = Br, I) underwent the reaction with thiocarbamoyl chloride efficiently to afford the corresponding 2-aminobenzothiazoles in good yields (83–94%). The features of this method
A simple and efficient protocol for the synthesis of 2-aminobenzothiazole derivatives is described. 2-Chloroanilines were treated with thiocarbamoyl chloride in the presence of Pd(dba)2 and t-BuOK to afford the corresponding 2-aminobenzothiazoles in good to excellent yield via a tandem manner.
Palladium-Catalyzed Synthesis of 2-Aminobenzothiazoles through Tandem Reaction
作者:Zhi-Bing Dong、Wan Xu、Meng-Tian Zeng、Min Liu、Sha-Sha Liu、Yue-Sheng Li
DOI:10.1055/s-0036-1588835
日期:2017.7
through a tandem approach in the presence of Pd(PPh3)4 and t-BuOK. The facile and efficient protocol enabled the reaction to proceed at a good rate with excellent yields. A variety of 2-aminobenzothiazoles were synthesized by using 2-chloroanilines and dithiocarbamates through a tandem approach in the presence of Pd(PPh3)4 and t-BuOK. The facile and efficient protocol enabled the reaction to proceed
A facile and efficient formation of 2-aminobenzothiazoles by a copper(II)-promoted one-pot cascade process was developed. The desired 2-aminobenzothiazoles were synthesized in good to excellent yields (up to 97 %) in the presence of Cu(OAc)(2) and K2CO3, a variety of functional groups on 2-iodoanilines could be tolerated. The method features ligand-free and mild reaction conditions and good yields