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公开(公告)号:US07683205B2
公开(公告)日:2010-03-23
申请号:US11590566
申请日:2006-10-31
申请人: Pandurang Balwant Deshpande , Kishore Khemani , Bharat Becharbhai Boda , Tushar Rajnikant Shah , Hitarth Harshendu Acharya , Parven Kumar Luthra
发明人: Pandurang Balwant Deshpande , Kishore Khemani , Bharat Becharbhai Boda , Tushar Rajnikant Shah , Hitarth Harshendu Acharya , Parven Kumar Luthra
IPC分类号: C07C271/40 , C07C215/46
CPC分类号: C07C213/08 , C07C269/00 , C07C217/50 , C07C271/44
摘要: The present invention relates to an improved process for preparation of Rivastigmine of formula (I) or pharmaceutically acceptable salts thereof comprising a step of N-methylation of compound of formula (III), wherein R1=R2=H or R1=H and R2=CH3 or an acid addition salt thereof, using paraformaldehyde in the presence of Raney Nickel and hydrogen in a suitable solvent to obtain compound of formula (II).
摘要翻译: 本发明涉及一种制备式(I)的利凡达明或其药学上可接受的盐的改进方法,其包括式(III)化合物的N-甲基化步骤,其中R1 = R2 = H或R1 = H,R2 = CH3或其酸加成盐,在阮内镍和氢气存在下,在合适的溶剂中使用多聚甲醛,得到式(II)化合物。
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公开(公告)号:US20080045743A1
公开(公告)日:2008-02-21
申请号:US11590566
申请日:2006-10-31
申请人: Pandurang Balwant Deshpande , Kishore Khemani , Bharat Becharbhai Boda , Tushar Rajnikant Shah , Hitarth Harshendu Acharya , Parven Kumar Luthra
发明人: Pandurang Balwant Deshpande , Kishore Khemani , Bharat Becharbhai Boda , Tushar Rajnikant Shah , Hitarth Harshendu Acharya , Parven Kumar Luthra
IPC分类号: C07C269/02
CPC分类号: C07C213/08 , C07C269/00 , C07C217/50 , C07C271/44
摘要: The present invention relates to an improved process for preparation of Rivastigmine of formula (I) or pharmaceutically acceptable salts thereof comprising a step of N-methylation of compound of formula (III), wherein R1=R2=H or R1=H and R2=CH3 or an acid addition salt thereof, using paraformaldehyde in the presence of Raney Nickel and hydrogen in a suitable solvent to obtain compound of formula (II).
摘要翻译: 本发明涉及一种制备式(I)的利凡斯坦或其药学上可接受的盐的改进方法,其包括式(III)化合物的N-甲基化步骤,其中R 1 = H 2或H 2 R 2 = CH 3或其酸加成盐,使用多聚甲醛 在阮内镍和氢气存在下,在合适的溶剂中,得到式(II)化合物。
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公开(公告)号:US07223863B2
公开(公告)日:2007-05-29
申请号:US11492246
申请日:2006-07-25
申请人: Pandurang Balwant Deshpande , Bharat Becharbhai Boda , Sachin Surendra Surti , Pranay Pravinchandra Shah
发明人: Pandurang Balwant Deshpande , Bharat Becharbhai Boda , Sachin Surendra Surti , Pranay Pravinchandra Shah
IPC分类号: C07D405/14 , C07D405/04
CPC分类号: C07D471/04
摘要: The present invention relates an improved process for the preparation of tetrahydro-β-carboline derivative of formula (V) which is useful as an intermediate for the preparation of Tadalafil of formula (I). Moreover, the present invention relates to the process for the preparation of Tadalafil of formula (I)
摘要翻译: 本发明涉及用于制备式(Ⅴ)的四氢-β-咔啉衍生物的改进方法,其可用作制备式(I)的他达拉非的中间体。 此外,本发明涉及制备式(I)的他达拉非的方法,
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