Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2006-02-21
2006-02-21
Berch, Mark L. (Department: 1624)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C558S052000
Reexamination Certificate
active
07002008
ABSTRACT:
A process for preparing a compound of the formulacomprising:(a) formation of 3(S)-(4-hydroxyphenyl)-3-methanesulfonyloxy-propionic acid methyl ester compound of the formula(b) cyclization of the product of Step (a) with 4-fluoroaniline to yield 1-(4-fluorophenyl)-4(S)-(4-hydroxyphenyl)-azetidin-2-one.
REFERENCES:
patent: 5856473 (1999-01-01), Shankar
patent: 6207822 (2001-03-01), Thiruvengadam et al.
Berch Mark L.
Gange David M.
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