Process for the preparation of (e)-5-(2-bromovinyl)-2'-deoxyuridine
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United States of America Patent
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Mar 8, 2005
Grant Date -
Apr 22, 2004
app pub date -
Aug 26, 2003
filing date -
Feb 28, 2001
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Abstract
Process of preparing (E)-5-(2-bromovynyl)-2'-deoxyuridine (Brivudine) characterized in that halogen-free solvent selected form esters or cyclic ethers are used in the bromination step of 5-ethyl-2'-deoxyuridine diacylate. The use of solvents is advantageous in respect of toxicity, discharge costs and environment protection.
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