Process for producing 2,6-dihalogenopurine

Details Process for producing 2,6-dihalogenopurine Process for producing 2,6-dihalogenopurine

2005-08-30

2005-08-30

Berch, Mark L. (Department: 1624)

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

Organic compounds

Pteroyl per se or having -c-, wherein x is chalcogen, bonded...

C544S277000

Reexamination Certificate

active

06936713

ABSTRACT:
A process for conveniently and efficiently preparing a 2,6-dihalogenopurine using an inexpensive starting material. A process for preparing a 2,6-dihalogenopurine, comprising treating a 2-amino-6-halogenopurine having a protective group at 7thposition or 9thposition with a diazotizating agent and a halogen source; and a process for preparing a 9-acyl-2-amino-6-halogenopurine, comprising treating a 2-amino-6-halogenopurine with an acylating agent in the presence of a base.

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