Process for preparation of beta -lactam derivatives

A process for preparing compounds of the formula I: (I) wherein X is sulphur, oxygen, methylene or sulphinyl (R or S configuration), R3 is hydrogen or methoxy, R4 is an optionally substituted (1-4C)alky group, Y is hydrogen or a carboxyl protecting group and Q is an optionally protected amino group...

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Bibliographic Details
Main Authors LOTUS; FRANK, SNAPE; EVAN W, PEGG; STEPHEN J
Format Patent
LanguageEnglish
Published 03.07.1990
Subjects
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Summary:A process for preparing compounds of the formula I: (I) wherein X is sulphur, oxygen, methylene or sulphinyl (R or S configuration), R3 is hydrogen or methoxy, R4 is an optionally substituted (1-4C)alky group, Y is hydrogen or a carboxyl protecting group and Q is an optionally protected amino group or an acylamino group, which comprises reacting a compound of formula (II) (II) with a compound of formula (III) (III) wherein R4 is as defined above and W and Z represent hydrogen atoms or a group or groups removable to yield the compound of formula (I). The compounds of the formula I are useful intermediates in the preparation of cephalosporin antibiotics.
Bibliography:Application Number: US19870048882