成功构建了一个简单的连续流动微反应器,用于吡啶的N-氧化。连续流动微反应器使用填充床微反应器中的钛硅沸石 (TS-1) 和 H 2 O 2 (在甲醇中作为溶剂)作为催化氧化系统,以高达 99% 的产率形成各种吡啶N-氧化物。与使用间歇反应器相比,该工艺是一种更安全、更环保、更高效的工艺。该装置连续运行800小时以上,催化剂保持良好的活性,为规模化生产提供了巨大潜力。
Visible-Light-Induced C2 Alkylation of Pyridine <i>N</i>-Oxides
作者:Wen-Man Zhang、Jian-Jun Dai、Jun Xu、Hua-Jian Xu
DOI:10.1021/acs.joc.6b02891
日期:2017.2.17
A photoredox catalytic method has been developed for the direct C2 alkylation of pyridineN-oxides. This reaction is compatible with a range of synthetically relevant functional groups for providing efficient synthesis of a variety of C2-alkylated pyridineN-oxides under mild conditions. Mechanistic studies are consistent with the generation of a radical intermediate along the reaction pathway.
Electrochemical Deoxygenation of N-Heteroaromatic N-Oxides
作者:P. Xu、H.-C. Xu
DOI:10.1055/s-0037-1611541
日期:2019.6
An electrochemical method for the deoxygenation of N-heteroaromatic N-oxide to give the corresponding N-heteroaromatics has been developed. Several classes of N-heterocycles such as pyridine, quinoline, isoquinoline, and phenanthridine are tolerated. The electrochemical reactions proceed efficiently in aqueous solution without the need for transition-metal catalysts and waste-generating reducing reagents
Novel process to prepare pioglitazone via several novel intermediates
申请人:Pandey Bipin
公开号:US20080300282A1
公开(公告)日:2008-12-04
A novel process for preparing thiazolidinediones, preferably Pioglitazone, as described. Also described are novel intermediates involved in its synthesis and process for their preparation and use in medicine.
NOVEL PROCESS TO PREPARE PIOGLITAZONE VIA SEVERAL NOVEL INTERMEDIATES
申请人:PANDEY Bipin
公开号:US20120077848A1
公开(公告)日:2012-03-29
A novel process for preparing thiazolidinediones, preferably Pioglitazone, as described. Also described are novel intermediates involved in its synthesis and process for their preparation and use in medicine.