Carbon-13 NMR Signals of Some Phenothiazine Derivatives

Department of Chemistry, University College of Science, Calcutta-700 009

Manuscript received 16 May 1981, accepted 2 February 1982

Carbon-13 nmr signal assignments of the CNS depressants promethazine (1), trimeprazine (2), chlorpromazine (3), prochlorperazine (4), triflupromazine (5), isothio­pendyl (6) and some of their salts are reported. C— H coupling constant (¹J and ²J) measurements have also been made.