Method for purifying 5′-protected...

Details Method for purifying 5′-protected... Method for purifying 5′-protected...

2005-10-25

2005-10-25

Lewis, Patrick (Department: 1623)

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

Organic compounds

Carbohydrates or derivatives

C536S025300, C536S025410, C536S028600, C536S028100

Reexamination Certificate

active

06958391

ABSTRACT:
A method for efficiently purifying 5′ protected 2′-deoxypurine nucleosides, efficient production of which has previously been difficult. Impurities can be separated by obtaining the 5′ protected 2′-deoxypurine nucleoside as an inclusion crystal including a solvent such as that having a nitrile structure in order to purify the 5′ protected 2′-deoxypurine nucleoside at a high purity. This invention enables synthesis of highly purified protected deoxypurine nucleosides easily on a large scale, which has previously been performed by column chromatography method.

REFERENCES:
patent: 5034518 (1991-07-01), Montgomery et al.
patent: 58-180500 (1983-10-01), None
patent: 60-152495 (1985-08-01), None
patent: 63-179889 (1988-07-01), None
patent: 6-507883 (1994-09-01), None
patent: WO 00/39138 (2000-07-01), None
patent: WO 00/75154 (2000-12-01), None

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