Hydrochloric Acid → 2,7-Bis(4-aminobutyryl)thioxanthene Dihydrochloride

Participants

Reaction Steps

2,7-Bis(4-phthalimidobutyryl)thioxanthene, prepared from 4-phthalimidobutyryl chloride and thioxanthene by the method of S.S. Cheng et al., J. Med. Chem. 9, 945 (1966), is treated with hot glacial acetic acid after which concentrated HCl is added gradually with stirring. The mixture is heated to reflux for 24 hours with a constant stream of HCl gas passing through the mixture. The reaction mixture is stirred and refluxed for an additional 24 hours, cooled, and the product worked up in the usual manner.

Provenance & Evidence