O-Ethyl carbamothioate → 2-Hydroxy-5,6-dihydro-4H-benzothiazol-7-one

Participants

Reaction Conditions

Reaction Steps

A mixture of 29.3 g of 2-chloro-1,3-cyclohexanedione [Muehlstaedt et al, J. Prakt Chem., Vol. 20 (1963), p. 285] and 21 g of ethyl thiocarbamate was heated at 140° C for 15 minutes and was then poured into water. The precipitate formed was recovered by vacuum filtering and was crystallized from isopropyl alcohol to obtain 12.2 g of 7-oxo-2,3,4,5,6,7-hexahydrobenzothiazoline-2-one melting at 262° C.

Provenance & Evidence