Process for preparing y-mercaptocarboxylic acid derivatives

Details Process for preparing y-mercaptocarboxylic acid derivatives Process for preparing y-mercaptocarboxylic acid derivatives

C - Chemistry, Metallurgy

07

D

C07D 333/78 (2006.01) C07C 319/02 (2006.01) C07C 323/51 (2006.01) C07D 333/32 (2006.01) C07D 333/50 (2006.01) C07C 323/52 (2006.01) C07C 323/53 (2006.01) C07C 323/60 (2006.01)

Patent

CA 2130723

.gamma.-Mercaptocarboxylic acids and their derivatives, in particular esters and amides, are prepared from .gamma.- butyrolactones via the corresponding thiolactones. The thiolactones are obtained by reaction of the lactones with thiocarboxylates in polar solvents and are converted into the .gamma.-mercaptocarboxylic acid derivatives by ring opening using nucleophilic reagents such as, for example, alkali metal alkoxides. The products are intermediates, for example for the synthesis of leucotriene antagonists.

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