Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Reexamination Certificate
2006-04-25
2006-04-25
Berch, Mark L. (Department: 1624)
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
C544S276000, C548S215000, C556S436000, C556S441000, C556S473000, C556S465000, C556S413000, C556S443000, C556S482000, C556S489000, C562S126000, C568S660000
Reexamination Certificate
active
07034152
ABSTRACT:
Processes are disclosed for preparing the antiviral agent entecavir. A resin adsorption process for the isolation and purification of entecavir is also disclosed. Various intermediates useful in the preparation of entecavir are also disclosed.
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Banerjee Amit
Bien Jeffrey T.
Chan Yeung Yu
Chen Chung-Pin H.
Evans Jeffrey M.
Berch Mark L.
Bristol--Myers Squibb Company
Volles Warren K.
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