申请人:Pfizer Inc.
公开号:US04772717A1
公开(公告)日:1988-09-20
A novel process is described for preparation of biotin comprising preparation of substituted 3H, 5H-imidazo[1,5c]tetrahydro thiazoles by contacting the boron trifluoride adduct of an appropriate thiazoline with the metallic derivative of an ester enolate, reducing the ester, hydrolyzing the thiazolidine moiety and hydrolyzing or oxidizing the resultant compound. Intermediates obtained in the preparation of biotin by the above process and alternate procedures for preparing said intermediates are also presented. A novel process for preparation of d-biotin is also given.
本发明描述了一种制备生物素的新工艺,包括通过将适当噻唑环的三氢-五氢咪唑[1,5c]四氢噻唑与酯酮的金属衍生物的硼氟三乙酰加合物接触,还原酯,水解噻唑环基团,以及水解或氧化所得化合物的制备方法。同时介绍了通过上述工艺制备生物素的中间体以及制备所述中间体的替代方法。此外,还提供了一种制备d-生物素的新工艺。