Chemical process for the preparation of intermediates to...

Details Chemical process for the preparation of intermediates to... Chemical process for the preparation of intermediates to...

2004-02-20

2008-11-18

Saeed, Kamal (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S518000, C548S526000, C546S269700, C546S278400, C546S279100, C549S439000

Reexamination Certificate

active

07452999

ABSTRACT:
Improved processes for preparing intermediates useful for preparing antibacterial N-[1-oxo-2-alkyl-3-(N-hydroxyformamido)-propyl}-(carbonylamino-aryl or -heteroaryl)-azacyclo4-7alkanes or thiazacyclo4-7alkanes, which have one or more of the following features: (1) make use of a particular β-lactam intermediate; (2) which make use of a particular resolving agents, enantiomerically pure substituted propionic acids, especially (R)-2-butyl-3-hydroxy-propionic acid; (3) which avoid the use of hydrogen peroxide; and (4) which facilitate selective debenzylation reducing production of waste by-products.

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