中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

401 records (took 0.02 seconds)

    Preparations of thiophosphites and thiophosphonates
    81.
    发明授权
    Preparations of thiophosphites and thiophosphonates 失效
    硫代亚磷酸酯和硫代磷酸酯的制备

    公开(公告)号：US6147244A

    公开(公告)日：2000-11-14

    申请号：US304252

    申请日：1999-05-03

    Applicant: Charles E. McKenna ,  Zengmin Li

    Inventor： Charles E. McKenna ,  Zengmin Li

    IPC: C07F9/201 ,  C07F9/40 ,  C07F9/06

    CPC classification number: C07F9/4065 ,  C07F9/201

    Abstract: Improved methods for converting phosphite or phosphonate esters into corresponding thiophosphites or thiophosphonates and for synthesizing specific thiophosphite and thiophosphonate compounds so produced are disclosed and claimed. The methods start from phosphite diesters using P.sub.4 S.sub.10 as the thionation reagent. The reaction mixture is refluxed until the reaction is complete and may be followed by separation and chloroformate ester phosphonation steps to produce pure thiophosphonocarboxylate triesters. Alternatively, these esters may be prepared directly by action of P.sub.4 S.sub.10 on the corresponding phosphonocarboxylate esters. The former method was used to prepare dimethyl thiophosphite and thence trimethyl thiophosphonoformate, a key intermediate in synthesis of salts of thiophosphonoformic acid, which have anti-viral properties.

    Abstract translation: 公开和要求保护的方法将亚磷酸酯或膦酸酯转化成相应的硫代亚磷酸酯或硫代膦酸酯并合成特定的硫代亚磷酸酯和硫代膦酸酯化合物。 该方法从使用P4S10作为硫化试剂的亚磷酸二酯开始。 将反应混合物回流直到反应完成，然后分离和氯甲酸酯膦酸化步骤以产生纯的硫代膦酰基羧酸酯三酯。 或者，这些酯可以通过P4S10在相应的膦酰基羧酸酯上的作用直接制备。 使用前一种方法制备二硫代亚磷酸二甲酯，然后制备硫代膦酰甲酸三甲酯，这是合成硫代膦酰甲酸盐的关键中间体，具有抗病毒性质。

    S,S-Dialkyl-O-alkylthioalkyl phosphites and phosphates
    85.
    发明授权
    S,S-Dialkyl-O-alkylthioalkyl phosphites and phosphates 失效
    S，S-二烷基-O-烷基硫代烷基亚磷酸酯和磷酸酯

    公开(公告)号：US3897521A

    公开(公告)日：1975-07-29

    申请号：US37421973

    申请日：1973-06-27

    Applicant: CIBA GEIGY AG

    Inventor： BERIGER ERNST ,  MARTIN HENRY

    IPC: C07F9/165 ,  C07F9/173 ,  C07F9/201 ,  C07F9/16 ,  A01N9/36

    CPC classification number: C07F9/201 ,  C07F9/1651 ,  C07F9/1653 ,  C07F9/173

    Abstract: Phosphoric acid esters of the formula

    wherein X denotes oxygen or sulphur, the integer n is the number 0 or 1, R'' and R'''' independently of each other represent an alkyl radical with 3 to 5 carbon atoms and wherein A. IF X is oxygen, R represents an alkoxyalkylene, alkylmercaptoalkylene or alkenyloxyalkylene radical with at most 7 carbon atoms, and alkenyl radical with 3 to 6 carbon atoms or an unsubstituted benzyl group or a benzyl group which is substituted by halogen, methyl and/or methoxy, or wherein B. IF X is sulphur, R represents an alkenyl radical with 3 to 6 carbon atoms or an unsubstituted benzyl group or a benzyl group substituted by halogen, methyl and/or methoxy; these compounds are useful for defoliating and promoting the ripening of crop plants especially cotton.

    Abstract translation: 式[O] n PARALLEL SR'RXP ANGLE S-R“的磷酸酯其中X表示氧或硫，整数n是数字0或1，R'和R”彼此独立地表示烷基 具有3至5个碳原子的基团，并且其中A。IF X是氧，R表示烷氧基亚烷基，具有至多7个碳原子的烷基巯基亚烷基或烯氧基亚烷基，以及具有3至6个碳原子的烯基或未取代的苄基或苄基 其被卤素，甲基和/或甲氧基取代，或其中B.IF X是硫，R表示具有3至6个碳原子的烯基或未被取代的苄基或被卤素，甲基和/或甲氧基取代的苄基 ; 这些化合物可用于脱叶和促进作物特别是棉花的成熟。

Patent Agency Ranking