Lawesson's reagent → 1-(2-Chloro-4,6-dimethylphenyl)piperidine-2-thione

Participants

Reaction Conditions

Reaction Steps

1-(2-Chloro-4,6-dimethylphenyl)piperidin-2-one (18.8 g) and Lawesson's reagent [2,4-bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide] (19.2 g) were combined in 150 mL toluene and the mixture was stirred in an 80° C. oil bath for 3 h. The reaction mixture was then cooled to room temperature and filtered. The filtrate was concentrated on the rotary evaporator and the residue was chromatographed on silica gel, eluting with 9:1 hexane/acetone, to provide 19.4 g of 1-(2-chloro-4,6-dimethylphenyl)piperidine-2-thione, mp 146.8-148.0° C.

Provenance & Evidence