Synthesis of hydroxysulfone and related compounds
    3.
    发明授权
    Synthesis of hydroxysulfone and related compounds 失效
    羟基砜及相关化合物的合成

    公开(公告)号:US5760249A

    公开(公告)日:1998-06-02

    申请号:US704195

    申请日:1996-08-28

    IPC分类号: C07D495/04

    CPC分类号: C07D495/04

    摘要: This invention is concerned with an improved process for the synthesis of hydroxysulfone, which is a key intermediate in the synthesis of carbonic anhydrase inhibitors, especially dorzolamide. Carbonic anhydrase inhibitors are known to be effective in treating elevated intraocular pressure or glaucoma.

    摘要翻译: 本发明涉及合成羟基砜的改进方法,羟基砜是合成碳酸酐酶抑制剂,特别是多佐胺的关键中间体。 已知碳酸酐酶抑制剂在治疗眼压升高或青光眼方面是有效的。

    Process for the preparation of cephamycin antibiotics
    7.
    发明授权
    Process for the preparation of cephamycin antibiotics 失效
    制备头孢霉素抗生素的方法

    公开(公告)号:US4218563A

    公开(公告)日:1980-08-19

    申请号:US025293

    申请日:1979-03-30

    CPC分类号: C07D501/57

    摘要: An improved process for preparing the antibiotic compound 7.beta.-(2-thienylacetamido)-7-methoxy-3-carbamoyloxymethyl-3-cephem-4-carboxylic acid, from the N-blocked esters of the compound 7.beta.-(D-5-amino-5-carboxyvaleramido)-3-carbamoyloxymethyl-7-methoxy-3-cephem-4-carboxylic acid (Cephamycin C), by conducting the transacylation of the latter in a homogenous solution containing N-trimethylsilyl loweralkyl carbamates.

    摘要翻译: 制备抗生素化合物7β-(2-噻吩乙酰氨基)-7-甲氧基-3-氨基甲酰氧基甲基-3-头孢烯-4-羧酸的改进方法,由化合物7β-(D- 5-氨基-5-羧基戊酰氨基)-3-氨基甲酰氧基甲基-7-甲氧基-3-头孢烯-4-羧酸(头孢霉素C),通过将其转化成含有N-三甲基甲硅烷基低级烷基氨基甲酸酯的均匀溶液。

    Process for racemizing an enantiomer of
5,6-dihydro-4-alkylamino-4H-thieno(or furo)
[2,3-B]-thiopyran-2-sulfonamide-7,7-dioxide
    8.
    发明授权
    Process for racemizing an enantiomer of 5,6-dihydro-4-alkylamino-4H-thieno(or furo) [2,3-B]-thiopyran-2-sulfonamide-7,7-dioxide 失效
    外消旋化5,6-二氢-4-烷基氨基-4H-噻吩并[2,3-b] - 噻喃-2-磺酰胺-7,7-二氧化物的对映体的方法

    公开(公告)号:US5011942A

    公开(公告)日:1991-04-30

    申请号:US474868

    申请日:1990-02-05

    IPC分类号: C07D495/04

    CPC分类号: C07D495/04

    摘要: Compounds classified as 5,6-dihydro-4-alkylamino-4H-thieno (or furo) [2,3-b]thiopyran-2-sulfonamide-7,7-dioxide are carbonic anhydrase inhibitors useful in the treatment of ocular hypertension, and most of the carbonic anhydrase inhibitory activity resides in only one of the enantiomers. The undesired enantiomer is utilized by racemization by thermolysis of an N-acyl derivative in a basic environment followed by removal of the acyl group. The racemate may then be resolved into the enantiomers.

    摘要翻译: 分类为5,6-二氢-4-烷基氨基-4H-噻吩并(或呋喃)[2,3-b]噻喃-2-磺酰胺-7,7-二氧化物的化合物是可用于治疗高眼压症的碳酸酐酶抑制剂, 并且大多数碳酸酐酶抑制活性仅驻留在一种对映异构体中。 通过在碱性环境中热解N-酰基衍生物,然后除去酰基,通过外消旋化来利用不需要的对映异构体。 然后将外消旋物分解成对映异构体。

    Process for preparing monomer of bile acid sequestrant polymer
    10.
    发明授权
    Process for preparing monomer of bile acid sequestrant polymer 失效
    制备胆汁酸螯合剂聚合物单体的方法

    公开(公告)号:US4093657A

    公开(公告)日:1978-06-06

    申请号:US675375

    申请日:1976-04-09

    CPC分类号: C07C209/12

    摘要: The invention disclosed herein relates to a novel process for preparing the monomer, 3-[N-(3-chloropropyl)methylamino]-N,N,N-trimethyl-propan-1-aminium chloride, which comprises reacting N,N-bis(3-chloropropyl)methylamine with trimethylamine. The 3,3-ionene monomer thus obtained is a key intermediate for making the linear, unbranched, non-cross-linked polymer, poly-[{methyl-(3-trimethylammoniopropyl)imino}trimethylene dichloride], which is valuable as an oral bile acid sequestrant.

    摘要翻译: 本文公开的本发明涉及制备单体3- [N-(3-氯丙基)甲基氨基] -N,N,N-三甲基 - 丙-1-胺氯化物的新方法,其包括使N,N-双 (3-氯丙基)甲胺与三甲胺反应。 由此获得的3,3-紫罗烯单体是制备直链,非支链的非交联聚合物聚[(甲基 - (3-三甲基铵丙基)亚氨基]三亚甲基二氯]的关键中间体,其作为口服有价值 胆汁酸螯合剂。