Process and intermediates for the preparation of...

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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10528612

ABSTRACT:
Novel Process and Intermediates. A process for preparing a compound of formula (I) where R4and R5are as defined in the specification; and R6is hydrogen or a protecting group, which process comprises cyclisation of a compound of formula (II) where R4and R5and R6are as defined in relation to formula (I), and R7is nitrogen protecting group, and removing the group R7, and thereafter if desired, removing any protecting group R6. Novel intermediates and the use of these in the formation of pharmaceutical compounds is also described and claimed

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