We identified novel (3R, 5S)-3-aminomethyl-5-methanesulfanyl hexanoic acid (5a: DS75091588) and (3R, 5S)-3-aminomethyl-5-ethanesulfanyl hexanoic acid (6a: DS18430756) as sulfur-containing y-amino acid derivatives that were useful for the treatment of neuropathic pain. These two compounds exhibited a potent analgesic effect in animal models of both type I diabetes and type II diabetes, and good pharmacokinetics. (C) 2018 Elsevier Ltd. All rights reserved.
The alkylation of aromatic compounds, such as benzene, toluene, chlorobenzene, and naphthalene, with optically active (S)-alkyl 2-(sulfonyloxy)propionates and (R)-alkyl 3-(sulfonyloxy)butanoates in the presence of AlCl3 afforded optically active (S)-alkyl 2-arylpropionates and (S)-alkyl 3-arylbutanoates in fair to good chemical yields (40-84%) and in good to excellent optical yields (61-97%). As usually occurs in Friedel-Crafts alkylation reactions, poor regioselectivity was observed.
PICCOLO, ORESTE;AZZENA, UGO;MELLONI, GIOVANNI;DELOGU, GIOVANNA;VALOTI, ER+, J. ORG. CHEM., 56,(1991) N, C. 183-187