Penicillin synthesis

Details Penicillin synthesis Penicillin synthesis

1976-11-30

1978-02-07

Schwartz, Gerald A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603067C, C07D49968, C07D49970

Patent

active

040726770

ABSTRACT:
Process of preparing phthalidyl ampicillin or other orally absorbable penicillin ester by esterification of the parent penicillin in a two-phase system using a phase transfer catalyst which increases the solubility of a salt form of the penicillin in the water-immiscible solvent used in the process. The phase transfer catalysts are quaternary ammonium salts or tertiary amines of non-low molecular weight, or crown ethers.

REFERENCES:
patent: 3860579 (1975-01-01), Ferres et al.
Hennis et al., I and E. C. Product Research and Development, 7(2), 96-101, (1968).

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