Method of preparing inhibitors of phosphodiesterase-4

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

Reexamination Certificate

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Reexamination Certificate

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06909002

ABSTRACT:
In one aspect, the present invention is directed to a one pot method of preparing intermediates of Formula V, which are useful in making inhibitors of phosphodiesterase-4:The present invention is also directed to a method of preparing phosphodiesterase inhibitors comprising the Formula

REFERENCES:
patent: 6677351 (2004-01-01), Li et al.

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