TiCl<sub>4</sub> mediated facile synthesis of 1,3,4-oxadiazoles and 1,3,4-thiadiazoles
作者:Lin Zhang、Yu Yu、Qiang Tang、Jianyong Yuan、Dongzhi Ran、Binghua Tian、Tao Pan、Zongjie Gan
DOI:10.1080/00397911.2019.1700521
日期:2020.2.1
Abstract An efficient method for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles and 1,3,4-thiadiazoles has been developed. Various hydrazides or thionyl hydrazides readily react with DMA derivatives in the presence of TiCl4 as a catalyst to afford the desired products. This protocol provides a simple and economical procedure that affords the target products with good yields and wide substrate
Electrophilic activation of nitroalkanes in efficient synthesis of 1,3,4-oxadiazoles
作者:Alexander V. Aksenov、Vladislav Khamraev、Nicolai A. Aksenov、Nikita K. Kirilov、Dmitriy A. Domenyuk、Vladimir A. Zelensky、Michael Rubin
DOI:10.1039/c9ra00976k
日期:——
A novel methodology for general and chemoselective preparation of non-symmetric 1,3,4-oxadiazoles is developed. This unusual reaction proceeds via polyphosphoric acid-assisted activation of nitroalkanes towards nucleophilic attack with acylhydrazides.
[EN] QUINAZOLINONE COMPOUNDS AND DERIVATIVES THEREOF<br/>[FR] COMPOSÉS QUINAZOLINONES ET LEURS DÉRIVÉS
申请人:AMGEN INC
公开号:WO2014036022A1
公开(公告)日:2014-03-06
Compounds of Formula I are useful inhibitors of tankyrase. Compounds of Formula I have the following structure: where the definitions of the variables are provided herein.
Convenient and efficient onepot method for the synthesis of 2,5‐disubstituted‐1,3,4‐oxadiazoles based on the reaction of N,N‐dimethyl amides with acid hydrazides has been developed. The methodology is applied to a wide range of difference aryl hydrazide and difference N,N‐dimethyl amides to 2,5‐disubstituted‐1,3,4‐oxadiazoles yield the in good to excellent yields. It will be possible wide useful application
SUBSTITUTED N-HETEROCYCLYL- AND N-HETEROARYL-TETRAHYDROPYRIMIDINONES AND THE SALTS THEREOF, AND THE USE OF SAME AS HERBICIDAL ACTIVE SUBSTANCES
申请人:Bayer Aktiengesellschaft
公开号:US20200390100A1
公开(公告)日:2020-12-17
The present invention relates to substituted N-heterocyclyl- and N-heteroaryltetrahydropyrimidinones of the general formula (I) or salts thereof,
where the radicals in the general formula (I) correspond to the definitions given in the description, and to the use thereof as herbicides, in particular for controlling broad-leaved weeds and/or weed grasses in crops of useful plants and/or as plant growth regulators for influencing the growth of crops of useful plants.