Iron-catalyzed 2-acylbenzothiazole formation from aryl ketones and benzothiazoles using oxygen as oxidant
作者:Saiwen Liu、Ru Chen、Hui Chen、Guo-Jun Deng
DOI:10.1016/j.tetlet.2013.05.050
日期:2013.7
A convenient and efficient method for the synthesis of 2-acylbenzothiazoles from benzothiazoles and aromatic ketones using oxygen as oxidant is described. FeCl3·6H2O showed the best reactivity among the various iron salts investigated. Various functional groups were well tolerated under the optimized reaction conditions.
Copper-Catalyzed Activation of Disulfides as a Key Step in the Synthesis of Benzothiazole Moieties
作者:Jakub Hyvl、Jiri Srogl
DOI:10.1002/ejoc.201000174
日期:2010.5
A convenient synthesis of substituted benzothiazoles has been accomplished by way of a copper catalyzed reaction of aromatic disulfide amines and aldehydes. The process, which involves copper catalyzed activation of disulfide functionality, proceeds in a tandem fashion via C–H bond activation, followed by aerobic oxidation of a resulting dihydrobenzothiazole intermediate. The scope and limitations
Manganese triacetate is introduced as a new reagent to replace potassiumferricyanide or bromine for radical cyclization of substituted thioformanilides. 2-Substituted benzothiazoles are generated in 6 min under microwave irradiation.