Process for preparing prostaglandin derivatives and starting...

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C549S200000, C549S429000, C549S456000

Reexamination Certificate

active

07345181

ABSTRACT:
The present invention provides a process for preparing benzoprostacycline derivatives of formula (1), i.e. 5,6,7-trinor-4,8-inter-m-phenylene PGI2 derivatives, and vinyl tin compounds of formula (III) as starting materials for the same.

REFERENCES:
patent: 5202447 (1993-04-01), Ohno et al.
patent: 5233059 (1993-08-01), Larock et al.
patent: 6852880 (2005-02-01), Ham et al.
patent: 6989458 (2006-01-01), Ham et al.
patent: WO-93/06095 (1993-04-01), None
patent: WO-2004/005274 (2004-01-01), None
H. Wakita et al., “Heterocycles”, vol. 48, No. 2, pp. 2559-2571 (1998).

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