Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2005-02-22
2005-02-22
Berch, Mark L. (Department: 1624)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C544S071000, C544S097000
Reexamination Certificate
active
06858727
ABSTRACT:
There is disclosed an azetidinone compound of the formula (I):wherein R is hydrogen, or a hydroxy protecting group, R1and R2are each independently alkyl of 1-15 carbon atoms, benzyl or cyclized together with the carbon atom to which they are attached to form a 5 or 6-membered cyclic hydrocarbon or a heterocyclic radical having one or two hetero ring atoms, said hetero ring atoms being selected from the group consisting of O and S; R3is lower alkyl or —COO(lower alkyl) R4is phenyl, or phenyl substituted with halogen, lower alkoxy or nitro which is useful as a synthetic intermediate to the 1′β-methylcarbapenem-type antibacterial agent.
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Chung Hee-jung
Chung Yong-ho
Jeong Won-jang
Kim Bong-jin
Kim Eun-jung
Berch Mark L.
Dong Wha Pharm, Ind. Co., Ltd.
Korea Research Institute of Chemical Technology
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