Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2007-06-12
2007-06-12
Meller, Michael (Department: 1655)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
active
10695930
ABSTRACT:
The invention relates to a novel process for the preparation of an aminoalcohol of the formularacemically or optically active, starting from 2-azabi-cyclo[2.2.1]hept-5-en-3-one, its further conversion to give the corresponding acyl derivative and its further conversion to (1S,4R)— or (1R,4S)-4-(2-amino-6-chloro-9-H-purine-9-yl)-2-cyclopentenyl-1-methanol of the formulaeIn the latter synthesis, the aminoalcohol is converted into the corresponding D- or L-tartrate, which is then reacted with N-(2-amino-4,6-dichloropyrimidin-5-yl) formamide of the formulato give (1S, 4R)- or (1R, 4S)-4-[(2-amino-6-chloro-5-formamido-4-pyrimidinyl)amino]-2-cyclopentenyl-1-methanol of the formulaeand then cyclized to give the end compounds.
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Berchtold Katja
Bernegger-Egli Christine
Breitbach Holger
Brieden Walter
Petersen Michael
Darby & Darby
Lonza AG
Meller Michael
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