Process for production of crystal of purine nucleoside compound

Details Process for production of crystal of purine nucleoside compound Process for production of crystal of purine nucleoside compound

2009-07-17

2011-10-11

Lewis, Patrick (Department: 1623)

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

Organic compounds

Carbohydrates or derivatives

C536S025300, C536S025410, C536S027120, C536S027100, C536S027130, C536S027200

Reexamination Certificate

active

08034924

ABSTRACT:
Crystals of a purine nucleoside compound, particularly crystals of 2′,3′-dideoxyinosine, which have excellent storage stability and have a concentration of phosphate attached to the crystal of 25 ppm or more, may be produce by: (1) preparing an aqueous solution containing phosphate ion (PO43−) and a purine nucleoside compound; and (2) crystallizing the purine nucleoside compound from the aqueous solution.

REFERENCES:
patent: 5451671 (1995-09-01), Shiragami et al.
Tai-Shun Lin, et al., “Synthesis and Antiviral Activity of Various 3′ -Azido, 3′ -Amino, 2′,3′ -Unsaturated, and 2′,3′ -Dideoxy Analogues of Pyrimidine Deoxyribonucleosides against Retroviruses1” Journal of Medicinal Chemistry, vol. 30, No. 2, 1987, pp. 440-444.

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