Process for the preparation of (e)-5-(2-bromovinyl)-2'-deoxyuridine
申请人:——
公开号:US20040077586A1
公开(公告)日:2004-04-22
The present invention relates to the preparation of (E)-5-(2-bromovynyl)-2′-deoxyuridine (Brivudine) characterized in that halogen-free solvents selected form esters or cyclic ethers are used in the bromination step of 5-ethyl-2′deoxyuridine diacy-late. The use of said solvents is advantageous in respect of toxicity, discharge costs and environment protection.