Process for producing 2,6-dihalogenopurine
US7321035B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Nov 19, 2004 |
| Grant date | Jan 22, 2008 |
| Priority date | — |
| Expiry date | Feb 23, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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 7th position or 9th position 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.