Thionyl Chloride → 10-[(2RS)-1-(1-pyrrolidinyl)-2-propyl]-2-phenothiazinecarbonyl chloride hydrochloride

Participants

Reaction Steps

Thionyl chloride (12.7 cc) is added in the course of 5 minutes, with stirring at a temperature of 4° C., to a suspension of 10-[(2RS)-1-(1-pyrrolidinyl)-2-propyl]-2-phenothiazinecarboxylic acid hydrochloride (9.77 g) in methylene chloride (250 cc), and stirring is continued for 90 minutes at a temperature of 20° C. The clear yellow solution obtained is concentrated to dryness under reduced pressure (30 mm Hg; 4 kPa) at 40° C. and dried to constant weight under reduced pressure (5 mm Hg; 0.67 kPa) at 50° C. to give 10-[(2RS)-1-(1-pyrrolidinyl)-2-propyl]-2-phenothiazinecarbonyl chloride hydrochloride (10.2 g) in the form of a yellow paste.

Provenance & Evidence