Process for the synthesis of C-2, C-3 substituted...

Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing

Reexamination Certificate

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Reexamination Certificate

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07842837

ABSTRACT:
The present invention provides method for making a compound of formula 1:comprising the steps of reacting compounds of formulas 2 and 3:to produce a compound of formula 4:wherein R1, R2, R3, R4and R5are defined as described herein. The compound of formula 4 is then converted to the compound of formula 1. The invention further comprises compounds of formulas 3 and 4 and methods for making compounds of formulas 3 and 4.

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