2-BENSYLTIO- the OR BENSYLSULFOXID-2-one-1-CYKLOPENTEN-KARBOXAMIDER, FOERFARANDEN Før deras FRAMSTAELLNING OCH deras ANVAENDNING VID audio synthesis is 4,5-trimethylene-4-ISOTIAZOLIN-3-oner.

摘要

A process for preparing a 4,5-tri or tetramethylene-4-isothiazoline-3-one comprises cyclizing a 2-alkyl or aralkyl thio-1-cycloalkene-1-carboxamide in the form of its sulfoxide in an organic solvent in the presence of a acid chloride and adding to the resulting 4,5-tri or tetramethylene-4-isothiazoline-3-one hydrochloride a mineral or organic base or water so as to free the 4,5-tri or tetramethylene-4-isothiazoline-3-one in the form of a free base.