Synthesis and Reactions of Azido-benzothiazoles and -benzothiophens; Novel Thiazolobenzoxazoles and Dihydrothienobenzoxazoles
6-Azidobenzothiazole and its 2-methyl and 2-methylthio-derivatives were prepared from the corresponding amine and gave the thiazolobenzoxazoles (8)-(10), on thermolysis in a polyphosphoric-acetic acid mixture. 6,7-Dihydro-2-methylthienobenzoxazole 8,8-dioxide (12) was prepared similarly.An improved method of synthesis of 2-fluoro-6-nitrobenzothiazole is reported.
Gallagher, Peter T.,Iddon, Brian,Suschitzky, Hans
p. 2358 - 2361
(2007/10/02)
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