申请人:Dowdell Verity
公开号:US20070293482A1
公开(公告)日:2007-12-20
A process for producing a compound which is a benzodiazepine derivative of formula: (I) wherein: represents or R
1
represents C
1-6
alkyl, aryl or heteroaryl; each R
3
is the same or different and represents halogen, hydroxy, C
1-6
alkyl, C
1-6
alkoxy, C
1-6
alkylthio, C
1-6
haloalkyl, C
1-6
haloalkoxy, amino, mono(C
1-6
alkyl)amino, di(C
1-6
alkyl)amino, nitro, cyano, —CO
2
R′, —CONR′R″, —NH—CO—R′, —S(O)R′, —S(O)
2
R′, —NH—S(O)
2
R′, —S(O)NR′R″ or —S(O)
2
NR′R″, wherein each R′ and R″ is the same or different and represents hydrogen or C
1-6
alkyl; n is from 0 to 3; X represents —NH—, —N(C
1
-C
6
alkyl)-, —CO—, —CO—NR′—, —S(O)— or —S(O)
2
—, wherein R′ is hydrogen or a C
1
-C
6
alkyl group; and R
4
represents hydrogen; or —CO—R
4
′ or —CO—NH—R
4 ′
, wherein R
4 ′
is a C
1
-C
6
alkyl, C
1
-C
6
hydroxyalkyl, aryl, heteroaryl, carbocyclyl or heterocyclyl group, which group is substituted by a C
1
-C
6
hydroxyalkyl, aryl, heteroaryl, carbocyclyl or heterocyclyl group or a —(C
1
-C
4
alkyl)-X
1
—(C
1
-C
4
alkyl)-X
2
—(C
1
-C
4
alkyl) group, wherein X
1
represents —O—, —S— or —NR′—, wherein R′ represents H or a C
1
-C
4
alkyl group and X
2
represents —CO—, —SO— or —SO
2
—; or R
4 ′
represents -A
1
-Y-A
2
, wherein: A
1
is an aryl, heteroaryl, carbocyclyl or heterocyclyl group; Y represents a direct bond or a C
1
-C
4
alkylene, —SO
2
—, —CO—, —O—, —S or —NR′—, wherein R′ is a C
1
-C
6
alkyl group; and A
2
is an aryl, heteroaryl, carbocyclyl or heterocyclyl group; or R
4
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 -ZR
5
, wherein: Z represents —CO—, —S(O)— or —S(O)
2
′; and R
5
represents C
1-6
alkyl, hydroxy, C
1-6
alkoxy, C
1-6
alkylthio, aryl, heteroaryl, carbocyclyl, heterocyclyl, aryl-(C
1-6
alkyl)-, heteroaryl-(C
1-6
alkyl)-, carbocyclyl-(C
1-6
alkyl)-, heterocyclyl-(C
1-6
alkyl)-, aryl-(C
1-6
alkyl)-O—, heteroaryl-(C
1-6
alkyl)-O—, carbocyclyl-(C
1-6
alkyl)-O—, heterocyclyl-(C
1-6
alkyl)-O— or —NR′R″ wherein each R′ and R″ is the same or different and represents hydrogen, C
1-6
alkyl, carbocyclyl, heterocyclyl, aryl, heteroaryl, aryl-(C
1-6
alkyl)-, heteroaryl-(C
1-6
alkyl)-, carbocyclyl-(C
1-6
alkyl)- or heterocyclyl-(C
1-6
alkyl)-; or a pharmaceutically acceptable salt thereof; which process comprises: (a) subjecting a racemic benzodiazepine derivative of formula: (IIa): wherein R
1
, R
3
, R
4
, n and X are as defined above, and R
2
represents an amino protecting group, to crystallisation induced dynamic resolution to yield a benzodiazepine derivative of formula (II): wherein, R
1
, R
2
, R
3
, R
4
, 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.