Method for producing 1,4-diphenyl azetidinone derivatives

Details Method for producing 1,4-diphenyl azetidinone derivatives Method for producing 1,4-diphenyl azetidinone derivatives

2006-11-20

2009-02-10

Berch, Mark L (Department: 1624)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S208000, C548S229000, C548S243000, C548S335100, C548S366400, C548S473000, C548S545000, C568S011000

Reexamination Certificate

active

07488818

ABSTRACT:
The present invention is directed to the preparation of novel compounds useful in the treatment of hyperlipidemia, arteriosclerosis, hypercholesterolemia, and other related metabolic disorders. More specifically, the present invention is a novel process for the preparation of 1,4-diphenylazetidinone derivatives from β-substituted amino amides which are protected in the presence of silylating agents and at least one cyclization catalyst whose structural formula is represented by one of the general formula:wherein the various R-groups are defined herein.

REFERENCES:
patent: 5306817 (1994-04-01), Thiruvengadam et al.
patent: 5631365 (1997-05-01), Rosenblum et al.
patent: 1362855 (2003-11-01), None
patent: WO 93/02048 (1993-02-01), None
patent: WO 95/01961 (1995-01-01), None
patent: WO 95/08532 (1995-03-01), None
patent: WO 02/50027 (2002-06-01), None

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