Homolytic acylation of benzothiazole. A diagnostic criterion for the presence of acyl radicals
作者:T. Caronna、R. Galli、V. Malatesta、F. Minisci
DOI:10.1039/j39710001747
日期:——
Benzothiazole is acylated by acylradicals obtained from aldehydes selectively in the 2-position. The nucleophilic character of acylradicals is also confirmed by the higher reactivity of the 6-nitro-derivative. The high reactivity is useful in syntheses; this reaction can also be used as a diagnosticcriterion for revealing the presence of acylradicals in the oxidation of aldehydes with various oxidizing
A new method has been developed for the one-pot construction of 2-acylbenzothiazoles via the Cu(OTf)(2)-catalyzed tandem reaction of ,-dihalidestyrenes with 2,2-disulfane-diyldianilines. A variety of different dihalidestyrenes and diphenyldisulfanes were efficiently converted into the corresponding 2-acylbenzothiszole derivatives in the presence of Cu(OTf)(2). Most importantly, this protocol allowed for the long chain 1,1-dibromohept-1-ene to be converted into the corresponding 2-hexylbenzo[d]thiazole in moderate yield.