Process for the production of penicillanic acid compounds
申请人:Yoshitomi Pharmaceutical Industries, Ltd.
公开号:EP0382863A1
公开(公告)日:1990-08-22
A process for the production of penicllic acid compounds, especially chloromethyl ester of penicillin G, penicillin V or sulbactam by esterification in the presence of a phase transfer catalyst of the general formula
(R¹)(R²)(R³) (R⁴)NX (III)
wherein R¹, R², R³ and R⁴ are the same or different and each is an alkyl or aralkyl group and X is a hydroxide, chloride, bromide or hydrogensulfate ion.