Azetidinone acetic acid intermediates for 5-epi-penicillins

Details Azetidinone acetic acid intermediates for 5-epi-penicillins Azetidinone acetic acid intermediates for 5-epi-penicillins

1974-11-14

1976-06-08

Rollins, Alton D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260239A, 2602393R, 260281GN, 260307H, 260326E, 26032637, C07D40304, C07D20508

Patent

active

039622762

ABSTRACT:
5-Epi-penicillin esters and acids, the acids being useful as inhibitors of .beta.-lactamase type enzymes, a process for preparing such compounds by reacting an ester of a 2-halo-.alpha.-(1'-halothio-1'-methylethyl)-4-oxo-3-imido-1-azetidineaceta te with (a) zinc in acid or (b) stannous chloride in an organic liquid medium at 0.degree. to 100.degree.C., and some new 2-halo-.alpha.-(1'-cyanodithia- or 1'-mercapto-1'-methylethyl)-4-oxo-3-imido-2-azetidineacetate which are useful as intermediates in preparing the 5-epi-penicillins.

REFERENCES:
patent: 3840556 (1974-10-01), Kukolja

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