Direct Oxygenation of C–H Bonds through Photoredox and Palladium Catalysis
作者:Sk. Sheriff Shah、Maniklal Shee、Amit Kumar Singh、Amrita Paul、N. D. Pradeep Singh
DOI:10.1021/acs.joc.9b03197
日期:2020.3.6
This report presents the oxygenation of C-H bonds via the merger of photocatalysis and Pd catalysis. Herein, we describe the utilization of a photocatalyst to oxidize an organopalladium(II) intermediate to high-valent PdIII or PdIV intermediates, which promotes the formation of C-O bonds. The demonstrated method works efficiently with various directing groups, such as oxime ether and benzothiazole
A robust one-pot synthesis of benzothiazoles from carboxylic acids including examples with hydroxyl and amino substituents
作者:Soraia Meghdadi、Mehdi Amirnasr、Peter C. Ford
DOI:10.1016/j.tetlet.2012.10.035
日期:2012.12
The cyclocondensation of 2-aminothiophenol and carboxylic acids to give benzothiazoles has been carried out under mild conditions using tetrabutylammonium bromide (TBAB) as the reaction medium and triphenyl phosphite as the catalyst. Shorter reaction times, rapid isolation of the products, and excellent yields are advantages of this method. The reaction is found to be general and quite tolerant to