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    • 9. 发明授权
    • Cyclic carbamate analogues of (+)-pilocarpine
    • (+) - 毛果芸香碱的环状氨基甲酸酯类似物
    • US5025027A
    • 1991-06-18
    • US446486
    • 1989-12-05
    • Henry RapoportPer Sauerberg
    • Henry RapoportPer Sauerberg
    • C07D413/06
    • C07D413/06
    • Pilocarpine analogues are provided having the structure ##STR1## where one of R.sub.1 or R.sub.2 is an alkyl, such as methyl, ethyl, propyl, butyl, and so forth, and the corresponding secondary alkyl groups, an aralkyl, such as benzyl, phenylethyl, phenylpropyl, and the corresponding secondary aralkyl residues, or a cycloalkyl having less than about 12 carbon atoms. R.sub.3 has at least two carbon atoms but less than about 9. These pilocarpine analogues have improved duration of biological activity with respect to pilocarpine. A particularly preferred compound is a muscarinic agonist equipotent with pilocarpine, where R.sub.2 is methyl, and R.sub.3 is ethyl.
    • 提供具有结构“IMAGE”的毛果芸香碱类似物,其中R 1或R 2中的一个为烷基,例如甲基,乙基,丙基,丁基等,以及相应的仲烷基,芳烷基如苄基,苯乙基, 苯基丙基和相应的仲芳烷基或具有小于约12个碳原子的环烷基。 R3具有至少两个碳原子但小于约9.这些毛果芸香碱类似物相对于毛果芸香碱具有改善的生物活性持续时间。 特别优选的化合物是与毛果芸香碱等效的毒蕈碱激动剂,其中R2是甲基,R3是乙基。
    • 10. 发明授权
    • Preparation of optically active ketones
    • 光学活性酮的制备
    • US4618710A
    • 1986-10-21
    • US417771
    • 1982-09-13
    • Henry RapoportThomas F. Buckley, III
    • Henry RapoportThomas F. Buckley, III
    • C07C271/06C07C307/02C07C311/00C07C125/065C07C125/067C07C143/74C07C143/78
    • C07C307/02C07C271/06C07C311/00
    • An optically active alpha-amino acid derivative having the formula: ##STR1## wherein: X is OH, Cl, Br, I, or OCOR.sub.3 ;Y is a radical selected to stabilize the alpha carbon atom of the alpha-amino acid derivative sufficiently to prevent significant change in symmetry thereof during replacement of X with an alkyl, aryl, alkenyl, alkynyl, alkaryl, aralkyl, alkenaryl or alkynaryl radical, or such radical having one or more chemical constituents thereon; andR.sub.1 and R.sub.2 are different from one another and are each hydrogen or an alkyl, aryl, alkenyl, alkynyl, alkaryl, aralkyl, alkenaryl, or alkynaryl radical, or such radical having one or more non-protic chemical constituents thereon is conventionally synthesized from the corresponding alpha-amino acid. The ##STR2## portion of the above derivative is converted to a ketone functionality without racemization.
    • 具有下式的光学活性α-氨基酸衍生物:其中:X是OH,Cl,Br,I或OCOR3; Y是选择的基团,以充分稳定α-氨基酸衍生物的α碳原子,以防止在用烷基,芳基,烯基,炔基,烷芳基,芳烷基,烯芳基或炔烃基取代X时其对称性的显着变化,或 这种基团在其上具有一种或多种化学成分; 并且R 1和R 2彼此不同,并且各自为氢或烷基,芳基,烯基,炔基,烷芳基,芳烷基,烯芳基或炔烃基,或者其上具有一个或多个非质子化学成分的基团通常由 相应的α-氨基酸。 上述衍生物的部分转化为酮官能团而不外消旋化。