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 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
Room‐Temperature Dialkylamination of Chloroheteroarenes Using a Cu(II)/PTABS Catalytic System
作者:Harshita Shet、Manisha Patel、Jyoti M. Waikar、Pavan M. More、Yogesh S. Sanghvi、Anant R. Kapdi
DOI:10.1002/asia.202201006
日期:2023.1.3
relevant molecules and methodologies to install these efficiently are highly desirable. We report herein a highly efficient, room-temperature dimethylamination of chloroheteroarenes performed via the in-situ generation of dimethylamine using N,N-dimethylformamide (DMF) as precursor with a large substrate scope that includes various heteroarenes, purines as well as commercially relevant drugs such as