Journal
RUSSIAN JOURNAL OF ORGANIC CHEMISTRY
Volume 47, Issue 9, Pages 1375-1379Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S107042801109020X
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Acylation of 2-aminobenzenethiol with methyl chloroformate in pyridine gave dimethyl 2,2'-disulfanediylbis(2,1-phenylene)dicarbamate instead of expected methyl 2-suylfanylphenylcarbamate. Heating of the product with zinc dust in glacial acetic acid led to the formation of 1,3-benzothiazol-2(3H)-one. Alkylation of the latter with 1,2-dibromoethane and allyl bromide, as well as acylation with chloroacetyl chloride, afforded the corresponding 3-substituted derivatives. 3-[3-(Pyridin-2-yl)-4,5-dihydroisoxazol-5-ylmethyl]-1,3-benzothiazol-2(3H)-one was synthesized with high regioselectivity by 1,3-dipolar cycloaddition of 3-allyl-1,3-benzothiazol-2(3H)-one to pyridine-2-carbonitrile oxide generated fromN-hydroxypyridine-2-carboximidoyl chloride hydrochloride by the action of triethylamine.
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