Process for preparing 3-hydroxy cephalosporins

Details Process for preparing 3-hydroxy cephalosporins Process for preparing 3-hydroxy cephalosporins

1975-10-29

1977-09-13

Rizzo, Nicholas S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Chalcogen in the nitrogen containing substituent

124246, 544 23, C07D50102, C07D50108

Patent

active

040481620

ABSTRACT:
3-Hydroxycephalosporins are prepared by treating a 3-hydroxy-4-bromo-2-(2-formylthio-4-oxo-3-amido or imido-1-azetidinyl)-2-butenoate ester with 1,5-diazabicyclo[3.4.0]non-5-ene (DBN) or 1,5-diazabicyclo[5.4.0]undec-5-ene (DBU) at a temperature of from about 0.degree. C. to about 25.degree. C.

REFERENCES:
patent: 3872086 (1975-03-01), Barton et al.

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