Preparation of azetidinones via novel protected intermediates

Details Preparation of azetidinones via novel protected intermediates Preparation of azetidinones via novel protected intermediates

1990-03-20

1991-04-16

Shen, Cecilia

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549548, 540200, C07D30312, C07D20508

Patent

active

050084046

ABSTRACT:
A multistep process is disclosed for preparing azetidinone intermediates used in the making penems and carbapenems wherein intermediates containing ##STR1## R' is independently hydrogen or 1, 2 or 3 of lower alkyl or lower alkoxy, preferably hydrogen, wherein R" is methyl, ethyl, a phenyl or alkyl, preferably ethyl, as a readily removable nitrogen protecting group are made.

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