Reactions of N-sulfinyltrifluoromethanesulfonamide with carboxylic acids
摘要:
Phenylacetic, diphenylacetic, salicylic, and cinnamic acids reacted with N-sulfinyltrifluoromethanesulfonamide (CF3SO2NSO) to give the corresponding N-acyltrifluoromethanesulfonamides CF3SO2NHCOR (R = PhCH2, Ph2CH, o-HOC6H4, PhCH=CH). The reaction of N-sulfinyl-trifluoromethanesulfonamide with 3-hydrazinobenzoic acid Occurred at the hydrazino group of the latter with conservation of the carboxy group and without elimination of SO2, and the product was 3-(2-sulfinylhydrazino)benzoic acid OSNNHC6H4CO2H.
Synthesis and Evaluation of N-(Phenylacetyl)trifluoromethanesulfonamides as Anticonvulsant Agents
摘要:
A series of N-(phenylacetyl)trifluoromethanesulfonamides (3a-g) was prepared according to the Topliss scheme in order to determine if aryl substitutents would influence anticonvulsant activity. In initial (phase I) screening and quantitative (phase II) evaluation, all seven compounds exhibited significant activity against MES- and scMet-induced seizures. N-(Phenylacetyl)trifluoromethanesulfonamide (3a) was then advanced through five additional testing phases (phases III-VII). Compound 3a displayed good oral bioavailability, low toxicity, and a larger protective index in mice than the prototype drugs, phenytoin, phenobarbital, valproate, and ethosuximide. Additionally, 3a exhibited a longer time to peak effect in all tests and a greater 24-h margin of safety (HD50/ED(50)) than the prototypes. Compound 3a blocked picrotoxin-induced seizures but was ineffective. against seizures induced by bicuculline or strychnine. In vitro receptor binding studies revealed that 3a did not displace [H-3]-labeled gamma-aminobutyric acid or [H-3]-labeled flunitrazepam, and tolerance did not develop during 5-day chronic administration.