[EN] METHOD FOR PREPARATION OF 3-ALKYLTHIO-2-BROMOPYRIDINE<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE 3-ALKYLTHIO-2-BROMOPYRIDINE
申请人:LG LIFE SCIENCES LTD
公开号:WO2015053576A1
公开(公告)日:2015-04-16
The present invention relates to a novel method for the preparation of a key intermediate pyridine compound for producing fluoroalkylpyridine-sulfonyl urea derivatives showing superior herbicidal activity, novel alkylthioolefin derivatives used in the preparation, and a method for the preparation thereof. According to the present method using the novel alkylthioolefin derivatives of Formula 2, the intermediate compound of Formula 1 for producing flucetosulfuron can be prepared, through a simple processing step, with a yield equivalent or superior to those of conventional methods.
Kucera,J. et al., Collection of Czechoslovak Chemical Communications, 1970, vol. 35, p. 3618 - 3627
作者:Kucera,J. et al.
DOI:——
日期:——
Cp2ZrCl2-catalyzed synthesis of 2-aminovinyl benzimidazoles under microwave conditions
作者:Qi Sun、Cheng-Jun Wang、Shan-Shan Gong、Yong-Jian Ai、Hong-Bin Sun
DOI:10.1016/j.cclet.2014.11.014
日期:2015.3
A microwave-assisted general method for the synthesis of 2-aminovinyl benzimidazoles has been developed. Treatment of the 1,2-phenylenediamines and N-arylated/N,N-diallcylated 3-aminoacroleins with bis(cyclopentadienyl)zirconium(IV) dichloride (Cp(2)ZECl(2)) as the catalyst under microwave irradiation for 3-5 min followed by in situ MnO2 oxidation afforded thirteen 2-aminovinyl benzimidazoles in good yields. (C) 2014 Qi Sun and Hong-Bin Sun. Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. All rights reserved.