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公开(公告)号:US20030204095A1
公开(公告)日:2003-10-30
申请号:US10309812
申请日:2002-12-05
IPC分类号: C07D277/56
CPC分类号: C07D277/24
摘要: The present invention provides a process for the preparation of 4-methyl-5-formyl-thiazole of the formula (I) 1 which comprises reducing the thiazole ester of the formula (III) to thiazole alcohol of the formula (IV), using sodium borohydride in the presence of AlCl3 in a solvent and oxidising using an oxidizing agent the thiazole alcohol of the formula (IV) to obtain 4-methyl-5-formyl-thiazole of the formula (I).
摘要翻译: 本发明提供制备式(I)的4-甲基-5-甲酰基 - 噻唑的方法,其包括使用硼氢化钠将式(III)的噻唑酯还原成式(IV)的噻唑醇 在AlCl 3存在下在溶剂中并使用氧化剂将式(Ⅳ)的噻唑醇氧化得到式(I)的4-甲基-5-甲酰基 - 噻唑。
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公开(公告)号:US20040092735A1
公开(公告)日:2004-05-13
申请号:US10310068
申请日:2002-12-05
发明人: Pandurang Balwant Deshpande , Pramod Narayan Deshpande , Bhausaheb Pandharinath Khadangale , Gautam Kumar Das , John Muthiah Raja Jeyakumar
IPC分类号: C07D501/14
CPC分类号: C07D501/00
摘要: The present invention relates to an improved process for the preparation of the sterile cefuroxime sodium of formula (I). 1
摘要翻译: 本发明涉及制备式(I)的无菌头孢呋辛钠的改进方法。
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3.
公开(公告)号:US20040087786A1
公开(公告)日:2004-05-06
申请号:US10315010
申请日:2002-12-10
发明人: Pandurang Balwant Deshpande , Bhausaheb Pandharinath Khadangale , Kumar Gurusamy , Ramesh Athmaram Konda
IPC分类号: C07D501/12
CPC分类号: C07D501/00 , Y02P20/55
摘要: The present invention relates to an improved process for the preparation of 3-propenyl cephalosporin DMF solvate, more particularly, the present invention relates to an improved process for the preparation of cefprozil DMF solvate of the formula (I), which is useful for the preparation of cefprozil of the formula (XIV). 1
摘要翻译: 本发明涉及一种制备3-丙烯基头孢菌素DMF溶剂化物的改进方法,更具体地说,本发明涉及制备式(I)的头孢丙呋胺溶剂合物的改进方法,其可用于制备 (XIV)的头孢丙烯。
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