Process for preparing...

Details Process for preparing... Process for preparing...

2007-04-17

2007-04-17

Rao, Deepak (Department: 1624)

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

C546S198000

Reexamination Certificate

active

10503478

ABSTRACT:
The process consists in condensing (2-methyl-6,7,8,9-tetrahydro-4 H-pyrido-[1,2-a]pyrimidin-3-yl)-acetaldehyd with 6-fluoro-3-piperidinyl)-1,2-benzisoxazole to yield the intermediate enamine, 3-{2-[4-(6-fluoro-benzo[d]isoxazol-3-yl)-piperidin-1-yl]vinyl}-2-methyl-6,7,8,9-tetrahydro-pyrido[1,2,-a]pyrimidin-4 -one followed by reduction of such an enamine.

REFERENCES:
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patent: WO-01 85731 (2001-11-01), None
Kim, et al., “An Efficient Synthesis of Risperidone via Stille Reaction: Antipsychotic, 5HT2, and Dopamine-D2-Antagonist,” Arch. Pharm. Res., vol. 28, No. 9, 1019-1022, 2005.

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