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    • 42. 发明授权
    • Process for preparing phosphonous acids
    • 制备膦酸的方法
    • US4740332A
    • 1988-04-26
    • US4513
    • 1987-01-20
    • John K. Thottathil
    • John K. Thottathil
    • C07F9/48
    • C07F9/48
    • A process is provided for preparing phosphonous acids of the structure wherein R.sub.1 is lower alkyl or arylalkyl ##STR1## which are useful in preparing phosphinic and phosphonic acid ACE inhibitors, which process includes the steps of treating an olefin of the structure R.sub.1 --CH.dbd.CH.sub.2 wherein R.sub.2 is lower alkyl or arylalkyl with a phosphorus-containing reagent such as sodium hypophosphite or hypophosphorous acid in the presence of an organic alcohol solvent such as ethanol or methanol, and a radical initiator such as azobisisobutyronitrile, under acidic conditions, preferably at the reflux temperature of the organic solvent, to form the phosphonous acid without forming the alkyl ester.
    • 提供了一种用于制备结构中的膦酸的方法,其中R1是可用于制备次膦酸和膦酸ACE抑制剂的低级烷基或芳基烷基,该方法包括以下步骤:处理结构R1-CH = CH2 其中R2在有机醇溶剂如乙醇或甲醇存在下,和诸如偶氮二异丁腈的自由基引发剂,优选在回流下使用含磷试剂如次磷酸钠或次磷酸,其中R 2为低级烷基或芳烷基 有机溶剂的温度,形成不形成烷基酯的膦酸。
    • 45. 发明授权
    • Method for making phosphinic acid intermediates
    • 制备次膦酸中间体的方法
    • US4594199A
    • 1986-06-10
    • US693419
    • 1985-01-22
    • John K. Thottathil
    • John K. Thottathil
    • C07F9/30C07F9/32C07F9/572C07F9/62C07F9/65
    • C07F9/62C07F9/301C07F9/303C07F9/304C07F9/306C07F9/3211C07F9/3223C07F9/3241C07F9/5721C07F9/5728
    • A method is provided for preparing phosphinic acid prodrug intermediates which are useful in preparing phosphinic acid angiotensin-converting enzyme inhibitors which method includes the step of coupling a phosphonous acid or its ester of the structure ##STR1## wherein R is H or lower alkyl and R.sup.1 is lower alkyl, aryl, arylalkyl, cycloalkyl or cycloalkylalkyl, with a conjugated compound of the structure ##STR2## wherein R.sup.2, R.sup.3 and R.sup.4 may be the same or different and each is independently H, lower alkyl or aryl, and Z is --CO.sub.2 R.sup.5 (wherein R.sup.5 is H or lower alkyl), ##STR3## (wherein R.sup.6 is H, lower alkyl aryl or arylalkyl), ##STR4## (wherein R.sup.7 and R.sup.8 are the same or different and are selected from the group consisting of H, lower alkyl, aryl, aryl-lower alkyl, cycloalkyl or cycloalkylalkyl and at least one of R.sup.7 and R.sup.8 is other than H, or R.sup.7 and R.sup.8 can be taken together with N to form a 5-, 6- or 7-membered heterocyclic ring ##STR5## which may or may not include a COOR.sup.5 substituent, which 5- or 6-membered N-containing ring may or may not be fused to an aryl ring), in the presence of a silylating agent, to form the phosphonic acid intermediate of the structure ##STR6## wherein R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 and Z are as defined above.
    • 提供了用于制备次膦酸前体药物中间体的方法,其可用于制备次膦酸血管紧张素转换酶抑制剂,该方法包括使结构式“IMAGE”的膦酸或其酯偶联的步骤,其中R是H或低级烷基和R1 与低级烷基,芳基,芳基烷基,环烷基或环烷基烷基的结合,与结构为“IMAGE”的共轭化合物,其中R2,R3和R4可以相同或不同,并且各自独立地为H,低级烷基或芳基,Z为-CO 2 R 5 (其中R 5为H或低级烷基),其中R 6为H,低级烷基芳基或芳烷基,其中R 7和R 8相同或不同,选自H,低级 烷基,芳基,芳基 - 低级烷基,环烷基或环烷基烷基,并且R 7和R 8中的至少一个不是H,或者R 7和R 8可与N一起形成5-,6-或7-元杂环, IMAGE>其可以包括或不包括COOR5取代基,其5-或6 在甲硅烷基化剂的存在下,在甲硅烷基化剂存在下,形成其中R,R 1,R 2,R 3和R 4以及Z的结构的膦酸中间体 如上所述。