ZnO nanoparticles-mediated regioselective synthesis of methyl-N-alkylated 1,2,3-triazole-4-carboxylates
作者:K. Prabakaran、Fazlur-Rahman Nawaz Khan、Jong Sung Jin
DOI:10.1007/s11164-011-0446-0
日期:2012.3
The 1,2,3-triazoles are versatile synthetic intermediates of many biologically active compounds, and their N -1 substituted analogues are potential pharmaceutically important derivatives. In this study, an efficient regioselective N -alkylation reaction of methyl-1 H -1,2 3-triazole-4-carboxylate 3 with alkyl halides 4 catalyzed by ZnO nanoparticles in the presence of potassium hydroxide as base and
1,2,3-三唑是许多生物活性化合物的通用合成中间体,它们的 N -1取代类似物是潜在的重要药学衍生物。在这项研究中,报告了在氢氧化钾为碱和以DMSO为溶剂的情况下,ZnO纳米颗粒催化的甲基-1 H -1,2-3-三唑-4-羧酸酯 3 与卤代烷 4 的高效区域选择性 N 烷基化反应。 从而以 良好的收率得到 N 1-烷基化的1,2,3-三唑-4-羧酸甲酯 5 。
HERBICIDAL ISOXAZOLINE COMPOUNDS
申请人:Boehmer Jutta Elisabeth
公开号:US20100004128A1
公开(公告)日:2010-01-07
Novel compounds of formula (I): wherein R
1
, R
2
, R
3
, R
4
, m, R
5
, R
6
, n and Y are as defined in claim
1
; or N-oxides, salts and optical isomers thereof. Furthermore, the present invention relates to processes for preparing compounds of formula (I), to herbicidal compositions comprising them and to methods of using them to control plants or to inhibit plant growth.
Compounds of formula I: wherein R
1
, R
2
, R
3
, R
4
, m, R
5
, R
6
, n and Y are as defined in claim
1
; or N-oxides, salts and optical isomers thereof. Furthermore, the present invention relates to processes for preparing compounds of formula (I), to herbicidal compositions comprising them and to methods of using them to control plants or to inhibit plant growth.