Process for the synthesis of nabumetone
    1.
    再颁专利
    Process for the synthesis of nabumetone 失效
    合成萘丁酮的方法

    公开(公告)号:USRE37813E1

    公开(公告)日:2002-08-06

    申请号:US09547936

    申请日:2000-04-11

    IPC分类号: C07C4565

    摘要: New process for the synthesis of the antiinflammatory drug known as nabumetone that consists in reacting 2-acetyl-5-bromo-6-methoxynaphthalene with an alkyl acetate in presence of an alkaline alcoholate to get 4-(5-bromo-6-methoxy-2-naphthyl)-4-hydroxybut-3-en-2-one that by catalytic hydrogenation in a polar solvent and in presence of a base gives 4-(6-methoxy-2-naphthyl)butan-2-one known as nabumetone.

    摘要翻译: 用于合成称为萘丁美酮的抗炎药物的新方法,其包括使2-乙酰基-5-溴-6-甲氧基萘与乙酸烷基酯在碱性醇化物存在下反应,得到4-(5-溴-6-甲氧基 - 2-萘基)-4-羟基丁-3-烯-2-酮,通过极性溶剂中的催化氢化和碱的存在,得到4-(6-甲氧基-2-萘基)丁-2-酮,称为萘丁酮 。

    Process for the preparation of 4-(8-chloro-5 6-dihydro-11h-benzo-(5 6)-cyclohepta-(1 2b)-pyridin-11-ylidene-1-piperidiniecarboxylic acid ethyl ester (loratadine)
    4.
    发明授权
    Process for the preparation of 4-(8-chloro-5 6-dihydro-11h-benzo-(5 6)-cyclohepta-(1 2b)-pyridin-11-ylidene-1-piperidiniecarboxylic acid ethyl ester (loratadine) 失效
    制备4-(8-氯-5,6-二氢-11h - 苯并 - (5,6) - 环庚烷 - (1 2b) - 吡啶-11-亚基-1-哌啶甲酸乙酯(氯雷他定)的方法,

    公开(公告)号:US07449583B2

    公开(公告)日:2008-11-11

    申请号:US10493314

    申请日:2002-10-29

    IPC分类号: C07D413/04

    摘要: A process and new oxazolinic intermediates for the preparation of 4-(8-chloro-5,6-dihydro-11H-benzo-[5,6]-cyclohepta-[1,2-b]-pyridin-11-ylidene)-1-piperidinecarboxylic acid ethyl ester (loratadine) is described. The process starts from 2-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)-3-methyl-pyridine, a new intermediate to obtain loratadine. 2-(4,4-dimethyl-4, 5-dihydrooxazol-2-yl)-3-methyl-pyridine is condensed with 3-chloro-benzyl-chloride and the resultant product is treated with Grignard reagent of 4-chloro-N-methyl-piperidine. [3-(2-(3-chloro-phenyl)-ethyl]-pyridin-2-yl]-1-(methyl-piperidin-4-yl)-methanone is obtained for subsequent hydrolysis. Starting from this last compound it is possible to obtain loratadine with known methods.

    摘要翻译: 用于制备4-(8-氯-5,6-二氢-11H-苯并[5,6] - 环庚烯 - [1,2-b] - 吡啶-11-亚基) - 酮的方法和新的恶唑啉中间体 描述了1-哌啶羧酸乙酯(氯雷他定)。 该方法从2-(4,4-二甲基-4,5-二氢恶唑-2-基)-3-甲基 - 吡啶开始,得到氯雷他定的新中间体。 将2-(4,4-二甲基-4,5-二氢恶唑-2-基)-3-甲基 - 吡啶与3-氯 - 苄基氯缩合,所得产物用格氏试剂4-氯-N - 甲基 - 哌啶。 得到[3-(2-(3-氯 - 苯基) - 乙基] - 吡啶-2-基] -1-(甲基 - 哌啶-4-基) - 甲酮用于随后的水解。 可能用已知的方法获得氯雷他定。

    Process for the preparation of 4-(8-chloro-5 6-dihydro-11h-benzo-(5 6)-cyclohepta-(1 2b)-pyridin-11-ylidene-1-piperidiniecarboxylic acid ethyl ester (loratadine)
    7.
    发明申请
    Process for the preparation of 4-(8-chloro-5 6-dihydro-11h-benzo-(5 6)-cyclohepta-(1 2b)-pyridin-11-ylidene-1-piperidiniecarboxylic acid ethyl ester (loratadine) 失效
    制备4-(8-氯-5,6-二氢-11h - 苯并 - (5,6) - 环庚烷 - (1 2b) - 吡啶-11-亚基-1-哌啶甲酸乙酯(氯雷他定)的方法,

    公开(公告)号:US20050171352A1

    公开(公告)日:2005-08-04

    申请号:US10493314

    申请日:2002-10-29

    摘要: A process and new oxazolinic intermediates for the preparation of 4-(8-chloro-5,6-dihydro-11H-benzo-[5,6]-clohepta-[1,2-b]-pyridin-11-ylidene)-1-piperidinecarboxylic acid ethyl ester (loratadine) is described. The process starts from 2-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)-3-methyl-pyridine, a new intermediate to obtain loratadine. 2-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)-3-methyl-pyridine is condensed with 3-chloro-benzyl-chloride and the resultant product is treated with Grignard reagent of 4-chloro-N-methyl-piperidine. [3-(2-(3-chloro-phenyl)-ethyl]-pyridin-2-yl]-1-(methyl-piperidin-4-yl)-methanone is obtained for subsequent hydrolysis. Starting from this last compound it is possible to obtain loratadine with known methods.

    摘要翻译: 用于制备4-(8-氯-5,6-二氢-11H-苯并[5,6] - 环庚烯 - [1,2-b] - 吡啶-11-亚基) - 酮的方法和新的恶唑啉中间体 描述了1-哌啶羧酸乙酯(氯雷他定)。 该方法从2-(4,4-二甲基-4,5-二氢恶唑-2-基)-3-甲基 - 吡啶开始,得到氯雷他定的新中间体。 将2-(4,4-二甲基-4,5-二氢恶唑-2-基)-3-甲基 - 吡啶与3-氯 - 苄基氯缩合,所得产物用格氏试剂4-氯-N - 甲基 - 哌啶。 得到[3-(2-(3-氯 - 苯基) - 乙基] - 吡啶-2-基] -1-(甲基 - 哌啶-4-基) - 甲酮用于随后的水解。 可能用已知的方法获得氯雷他定。

    Process for preparing 5-amino-2,4,6-triiodoisophthalic acid dichloride
by chlorination of the corresponding acid in the presence of a tertiary
amine salt or quaternary ammonium salt
    9.
    发明授权
    Process for preparing 5-amino-2,4,6-triiodoisophthalic acid dichloride by chlorination of the corresponding acid in the presence of a tertiary amine salt or quaternary ammonium salt 失效
    通过在叔胺盐或季铵盐的存在下氯化相应的酸来制备5-氨基-2,4,6-三碘代邻苯二甲酸二氯化物的方法

    公开(公告)号:US5856570A

    公开(公告)日:1999-01-05

    申请号:US836984

    申请日:1997-05-29

    CPC分类号: C07C227/18

    摘要: A process for the preparation of 5-amino-2,4,6-triiodoisophthalic acid dichloride by chlorinating 5-amino-2,4,6-triiodoisophthalic acid with thionyl chloride in the presence of a suitable solvent and of a tertiary amine salt or quaternary ammonium salt in a molar ratio from 1;1 to 1;2 with respect to 5-amino-2,4,6-triiodoisophathalic acid is described. 5-amino-2,4,6-triiodoisophthalic acid dichloride is an intermediate useful for the preparation of iodinated contrast agents.

    摘要翻译: PCT No.PCT / EP95 / 04635 371日期1997年5月29日 102(e)日期1997年5月29日PCT提交1995年11月24日PCT公布。 第WO96 / 16927号公报 日期1996年6月6日制备5-氨基-2,4,6-三碘代邻苯二甲酸二氯化物的方法,该方法是在合适的溶剂存在下,用亚硫酰氯将5-氨基-2,4,6-三碘代邻苯二甲酸氯化, 描述了相对于5-氨基-2,4,6-三碘间苯二甲酸,摩尔比为1; 1至1; 2的叔胺盐或季铵盐。 5-氨基-2,4,6-三碘邻苯二甲酸二氯化物是可用于制备碘化造影剂的中间体。