Monatshefte fur Chemie p. 623 - 628 (1984)
Update date:2022-08-31
Topics:
Kollenz, Gert
Seidler, Peter
By 14C-labeling it is shown that the ring contraction reaction of 1,4-benzothiazin-2,3-4H-dione (1), leading via benzthiazol-2-carbonic acid (2) finally to benzthiazole (3), proceeds via hydrolytic opening of the thiolactone-bond in 1, irrespectively of H(+) or OH(-) catalysis. - (Keywords: 14C-Labeling; Ring contraction reaction; 1,4-Benzothiazin-2,3-4H-dione; Benzthiazole)
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