申请人:CVAK Ladislav
公开号:US20090292131A1
公开(公告)日:2009-11-26
A paclitaxel intermediate of formula 1:
wherein R
1
is acetyl, R
2
is tert-butyloxycarbonyl (BOC), R
3
and R
4
are phenyl and R
5
is 1-ethoxyethyl, is provided.
Also provided are processes for preparing taxane intermediates of formula 1
comprising reacting a compound of formula 2
with a compound of formula 3
wherein,
R
1
, R
2
and R
5
are independently a hydroxyl protecting group;
R
3
is phenyl, substituted phenyl, a straight or branched alkyl containing 1 to 12 carbon atoms, alkenyl containing 2 to 12 carbon atoms, cycloalkyl containing 4 to 15 carbon atoms, cycloalkenyl or an R
6
—O— group in which R
6
is:
phenyl, substituted phenyl group, a C
1
-C
8
straight or branched alkyl, a C
2
-C
8
straight or branched alkenyl group, a C
3
-C
8
straight or branched alkynyl, a C
3
-C
7
cycloalkyl, C
4
-C
7
cycloalkenyl, a C
7
-C
11
bicycloalkyl substituent, or a saturated or unsaturated nitrogen; and
R
4
is phenyl or a substituted phenyl group.
提供一种式子为1的紫杉醇中间体,其中R1为乙酰基,R2为叔丁氧羰基(BOC),R3和R4为苯基,R5为1-乙氧基乙基。还提供了制备式子1的紫杉烷中间体的方法,包括将式子2的化合物与式子3的化合物反应,其中,R1、R2和R5分别是羟基保护基;R3为苯基、取代苯基、含1至12个碳原子的直链或支链烷基、含2至12个碳原子的烯基、含4至15个碳原子的环烷基、环烯基或R6-O-基,其中R6为:苯基、取代苯基、C1-C8直链或支链烷基、C2-C8直链或支链烯基、C3-C8直链或支链炔基、C3-C7环烷基、C4-C7环烯基、C7-C11双环烷基取代基或饱和或不饱和氮基;R4为苯基或取代苯基。