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    • 9. 发明申请
    • Process for Preparing Benzodiazepines
    • US20070293482A1
    • 2007-12-20
    • US10593665
    • 2005-03-21
    • Verity DowdellRichard KelseyMalcolm CarterElisa Henderson
    • Verity DowdellRichard KelseyMalcolm CarterElisa Henderson
    • A61K31/5513A61P31/12C07D243/24C07D243/26
    • C07D243/24Y02P20/55
    • A process for producing a compound which is a benzodiazepine derivative of formula: (I) wherein: represents or R1 represents C1-6 alkyl, aryl or heteroaryl; each R3 is the same or different and represents halogen, hydroxy, C1-6 alkyl, C1-6 alkoxy, C1-6 alkylthio, C1-6 haloalkyl, C1-6 haloalkoxy, amino, mono(C1-6 alkyl)amino, di(C1-6 alkyl)amino, nitro, cyano, —CO2R′, —CONR′R″, —NH—CO—R′, —S(O)R′, —S(O)2R′, —NH—S(O)2R′, —S(O)NR′R″ or —S(O)2NR′R″, wherein each R′ and R″ is the same or different and represents hydrogen or C1-6 alkyl; n is from 0 to 3; X represents —NH—, —N(C1-C6alkyl)-, —CO—, —CO—NR′—, —S(O)— or —S(O)2—, wherein R′ is hydrogen or a C1-C6 alkyl group; and R4 represents hydrogen; or —CO—R4′ or —CO—NH—R4 ′, wherein R4 ′ is a C1-C6 alkyl, C1-C6 hydroxyalkyl, aryl, heteroaryl, carbocyclyl or heterocyclyl group, which group is substituted by a C1-C6 hydroxyalkyl, aryl, heteroaryl, carbocyclyl or heterocyclyl group or a —(C1-C4 alkyl)-X1—(C1-C4 alkyl)-X2—(C1-C4 alkyl) group, wherein X1 represents —O—, —S— or —NR′—, wherein R′ represents H or a C1-C4 alkyl group and X2 represents —CO—, —SO— or —SO2—; or R4 ′represents -A1-Y-A2, wherein: A1 is an aryl, heteroaryl, carbocyclyl or heterocyclyl group; Y represents a direct bond or a C1-C4 alkylene, —SO2—, —CO—, —O—, —S or —NR′—, wherein R′ is a C1-C6 alkyl group; and A2 is an aryl, heteroaryl, carbocyclyl or heterocyclyl group; or R4 is a group selected from aryl-C(O)—C(O)—, heteroaryl-C(O)—C(O)—, carbocyclyl-C(O)—C(O)—, heterocyclyl-C(O)—C(O)— and -ZR5, wherein: Z represents —CO—, —S(O)— or —S(O)2′; and R5 represents C1-6 alkyl, hydroxy, C1-6 alkoxy, C1-6 alkylthio, aryl, heteroaryl, carbocyclyl, heterocyclyl, aryl-(C1-6 alkyl)-, heteroaryl-(C1-6 alkyl)-, carbocyclyl-(C1-6 alkyl)-, heterocyclyl-(C1-6 alkyl)-, aryl-(C1-6 alkyl)-O—, heteroaryl-(C1-6 alkyl)-O—, carbocyclyl-(C1-6 alkyl)-O—, heterocyclyl-(C1-6 alkyl)-O— or —NR′R″ wherein each R′ and R″ is the same or different and represents hydrogen, C1-6 alkyl, carbocyclyl, heterocyclyl, aryl, heteroaryl, aryl-(C1-6 alkyl)-, heteroaryl-(C1-6 alkyl)-, carbocyclyl-(C1-6 alkyl)- or heterocyclyl-(C1-6 alkyl)-; or a pharmaceutically acceptable salt thereof; which process comprises: (a) subjecting a racemic benzodiazepine derivative of formula: (IIa): wherein R1, R3, R4, n and X are as defined above, and R2 represents an amino protecting group, to crystallisation induced dynamic resolution to yield a benzodiazepine derivative of formula (II): wherein, R1, R2, R3, R4, n and X are as defined above; and (b) deprotecting the benzodiazepine derivative of formula (II) as defined above to yield a benzodiazepine derivative of formula (I) or a pharmaceutically acceptable form thereof as defined above.