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    • 7. 发明授权
    • Benzimidazole derivatives
    • US06436982B1
    • 2002-08-20
    • US09992956
    • 2001-11-05
    • Yoon T. JeonCharles Gluchowski
    • Yoon T. JeonCharles Gluchowski
    • A61K31415
    • C07D403/12
    • This invention provides compounds having the structure: wherein each of R1, R2, R3 and R9 is independently H; straight chain or branched, substituted or unsubstituted C1-C7 alkyl, C2-C7 alkenyl or alkynyl; C3-C7 cycloalkyl or cycloalkenyl; acyl, phenyl, substituted phenyl, or heteroaryl; wherein each dashed line represents a single bond or a double bond with the proviso that if R1 is present, R3 is absent and there is a double bond between N at position 3 and C at position 2 and a single bond between C at position 2 and N at position 1 and if R3 is present, R1 is absent and there is a double bond between N at position 1 and C at position 2 and a single bond between C at position 2 and N at position 3; wherein each of R4, R5 and R6 is independently H, F, Cl, Br, I; straight chain or branched, substituted or unsubstituted C1-C7 alkyl, C2-C7 alkenyl or alkynyl; C3-C7 cycloalkyl or cycloalkenyl; phenyl, substituted phenyl, heteroaryl, —OH, —OR7, —CN, —COR7, —CO2R7, —CON(R7)2, —OCOR7, —SR7, —N(R7)2, —NR7COR7, —(CH2)nOR7, —(CH2)nN(R7)2, —(CH2)nNR7COR7, wherein n is an integer from 1 to 4; and wherein each of R7 and R8 is independently H; straight chain or branched, substituted or unsubstituted C1-C7 alkyl, C2-C7 alkenyl or alkynyl; phenyl or substituted phenyl. These compounds are selective for cloned human alpha 2 receptors and are useful as analgesic, sedative or anaesthetic agents.