申请人:Handa Kumar Vijay
公开号:US20050075506A1
公开(公告)日:2005-04-07
The present invention is directed to a new process of preparing highly pure Florfenicol. The invention is further directed to new oxazolidine derivatives useful in making Florfenicol and processes of making these derivatives. Examples of such intermediates include (4R,5R)-3-acetyl-2,2-dimethyl-4-hydroxymethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine; and (4S,5R)-3-acetyl-2,2-dimethyl-4-fluoromethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine.
本发明涉及一种制备高纯度氟苯菲醇的新工艺。本发明还涉及新的噁唑啉衍生物,用于制备氟苯菲醇和制备这些衍生物的过程。这些中间体的例子包括(4R,5R)-3-乙酰基-2,2-二甲基-4-羟甲基-5-[4-(甲磺酰基)苯基]-1,3-噁唑啉和(4S,5R)-3-乙酰基-2,2-二甲基-4-氟甲基-5-[4-(甲磺酰基)苯基]-1,3-噁唑啉。