One-Pot Synthesis of N-Arylpyrazoles from Arylhalides
摘要:
A simple one-pot method for the synthesis of diversely functionalized pyrazoles from aryl nucleophiles, di-tert-butylazodicarboxlate, and 1,3-dicarbonyl or equivalent compounds is presented.
Electrophotocatalysis with a Trisaminocyclopropenium Radical Dication
作者:He Huang、Zack M. Strater、Michael Rauch、James Shee、Thomas J. Sisto、Colin Nuckolls、Tristan H. Lambert
DOI:10.1002/anie.201906381
日期:2019.9.16
electrophotocatalytic oxidation platform. This chemistry employs a trisaminocyclopropenium (TAC) ion catalyst, which is electrochemically oxidized to form a cyclopropenium radical dication intermediate. The radical dication undergoes photoexcitation with visible light to produce an excited-state species with oxidizing power (3.33 V vs. SCE) sufficient to oxidize benzene and halogenated benzenes via single-electron
可见光光催化和电催化是促进化学反应的两种强大策略。在这里,这两种模式结合在电光催化氧化平台中。该化学过程采用三氨基环丙烯 (TAC) 离子催化剂,通过电化学氧化形成环丙烯自由基阳离子中间体。自由基阳离子在可见光下进行光激发,产生具有氧化能力(3.33 V vs. SCE)的激发态物质,足以通过单电子转移(SET)氧化苯和卤代苯,从而导致 CH/NH 与唑类偶联。提供了光激发物质的强氧化行为的基本原理,同时通过顺式2,6-二甲基哌啶部分的特定构象合理化了催化剂的稳定性。
Pyrazole-4-Carboxamide Derivatives as Microbiocides
申请人:Lamberth Clemens
公开号:US20080188442A1
公开(公告)日:2008-08-07
Compounds of the formula I in which the substituents are as defined in claim
1
are suitable for use as microbiocides.