CN100429207C - 二甲氧基多西他赛丙酮化物及其制备方法 - Google Patents

二甲氧基多西他赛丙酮化物及其制备方法 Download PDF

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CN100429207C
CN100429207C CNB200480026128XA CN200480026128A CN100429207C CN 100429207 C CN100429207 C CN 100429207C CN B200480026128X A CNB200480026128X A CN B200480026128XA CN 200480026128 A CN200480026128 A CN 200480026128A CN 100429207 C CN100429207 C CN 100429207C
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E·迪迪埃
M-A·佩林
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Abstract

本发明涉及二甲氧基多西他赛丙酮化物,即4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯,本发明还涉及通过在水-丙酮中结晶制备该化合物的方法。

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二甲氧基多西他赛丙酮化物及其制备方法
本发明涉及二甲氧基多西他赛,即4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯的丙酮化物,本发明还涉及其制备方法。
4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯具有显著的抗癌和抗白血病的活性。
根据文献中公开的方法,特别是国际专利申请PCT WO 96/30355或国际专利申请PCT WO 99/25704中公开的方法,可以制备4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯,但是根据这些专利文献中公开的方法制备的化合物不是结晶的,而且对这些化合物也没有进行表征。
申请人发现,从化学观点来看,完全可以对4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯的丙酮化物进行表征。
根据本发明,可以通过使4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯从水和丙酮的混合物中结晶、然后减压干燥分离的产物可以获得4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯的丙酮化物。
实施本发明的方法,具有显著的优点:
-将4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯溶于丙酮中,
-用水处理得到的溶液,
-向上述溶液中加入产物在丙酮/水混合物中的悬浮液进行种晶,然后再次用水处理,
-分离产生的结晶,然后
-减压干燥。
通常而言,将4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯溶于丙酮中。优选相对于4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯的重量(以克表示),丙酮的量为5-20体积份(ml)(最好为10)。
优选种晶的浓度为每升混合物采用60-80g(最好为68g),所述混合物为体积比65/35-75/25、优选约68/32的丙酮/水混合物。沉淀结束时,丙酮/水混合物的体积比为70/30-30/70(最好为45/55)。根据本发明优选的实施方案,整个结晶过程于20±5℃(最好为20℃)进行。
分离4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯丙酮化物结晶,优选通过过滤或离心。干燥在减压下进行,通常为0.5-30kPa,优选0.7kPa,温度为30-60℃,优选40℃。
对产物的干燥进行分析。为此,将4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯的丙酮化物样品于70℃以上(70-100℃)进行小心处理,表明随着温度的升高丙酮含量逐渐减少。因此,干燥时,优选的温度为30-60℃,更优选40℃。丙酮含量的均值为7%,这表示接近于丙酮的化学计算量,对于含有一个丙酮分子的溶剂化物而言,该量为6.5%。
用下面的实施例对本发明进行更详细地描述,但是本发明的范围不受其限制。
实施例1
于20±5℃环境温度下,将940ml纯净水加至207g约92%重量的4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基的约2升丙酮溶液中,然后加入2g 4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯在20ml水和20ml丙酮的混合物中的悬浮液进行种晶。将混合物搅拌约10-22小时,用4-5小时加入1.5升纯净水,然后将混合物搅拌60-90分钟,减压过滤悬浮液,用450ml丙酮和550ml纯净水的混合液洗涤滤器上的滤饼,在烘箱中于55℃减压下(0.7kPa)干燥4小时。得到197g 4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯丙酮化物,其中含有0.1%水和7.2%丙酮(溶剂化物化学计算的理论量为6.5%)。
干燥研究
将产物置于烘箱中,随后分别于0.7kPa减压下于60℃干燥18小时,于约80%相对湿度下(160mmHg压力)于60℃干燥3小时和于约80%相对湿度下(200mmHg压力)于70℃干燥18小时。此时,含水量为0.2%,丙酮含量为4.7%(194g)。同时,取1g/份于5mmHg减压下于80℃干燥18小时(丙酮残留量为0.5%),然后于100℃干燥21小时(丙酮残留量为0.02%)。于5mmHg减压下于80℃将其余部分干燥31小时(丙酮含量为1.7%,水含量为0.3%,相对于96.5%,纯度高于99%).
获得图(图1)所用的操作条件
该分析在配有Anton Paar TTK温度控制室的Bruker D5000衍射仪上进行。反射设置具有Bragg-Brentano型聚焦几何形状(θ-θ)。将粉末置于一个空的铝样品支架上。钴对阴极管(40kV/30mA)提供铁过滤的(iron-filtered)入射的辐射线。辐射在两个波长处发出:
Figure C20048002612800051
铁过滤并不能完全去除Kβ辐射(对钴,
Figure C20048002612800053
Figure C20048002612800054
),因此仍然可以以Kα双线强度的1%(生产商提供的数据)参加入射的辐射。
Soller狭缝可以提高光束的平行度。可变的前狭缝(variable front slits)使得样品的光照区保持恒定。在所述管和测定室之间的1mm的平行光管限制了散射。采用Braun 50M多室线性检测器。检测视窗的2θ角的宽度为10°。记录该图的条件如下:2θ扫描为1.5-50°,于室温、环境压力和相对湿度下2θ每度计数30秒。
图1代表实施例1的产物的丙酮化物(A型)的参照PXRD图。
实施例1的产物的NMR数据:
1H NMR数据(400MHz,CDCl3,δ以ppm表示):1.20(s,3H),1.22(s,3H),1.37(s,9H),1.67(s,1H),1.72(s,3H),1.80(mt,1H),1.88(s,3H),2.17(s,6H),2.20-2.40(mt,2H),2.36(s,3H),2.70(mt,1H),3.30(s,3H),3.46(s,3H),3.47(mt,1H),3.82(d,J=7.5Hz,1H),3.86(dd,J=11,6.5Hz,1H),4.17(d,J=8.5Hz,1H),4.30(d,J=8,5Hz,1H),4.63(mt,1H),4.80(s,1H),4.97(宽峰d,J=10Hz,1H),5.27(宽峰d,J=10Hz,1H),5.44(d,J=10Hz,1H),5.64(d,J=7.5Hz,1H),6.21(t,J=9Hz,1H),7.25-7.45(mt,5H),7.49(t,J=7.5Hz,2H),7.60(宽峰t,J=7.5Hz,1H),8.09(d,J=7.5Hz,2H)。

Claims (10)

1.4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯的丙酮化物,其中含有6.5%重量的丙酮。
2.制备4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯丙酮化物的方法,其特征在于使4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯从水和丙酮的混合物中结晶,用上述产物在丙酮/水混合物中的悬浮液种晶,然后用水处理,减压干燥得到的产物。
3.根据权利要求2的方法,其特征在于种晶以每升混合物采用60-80g的浓度进行,所述混合物含有丙酮与水的体积比为65/35-75/25。
4.根据权利要求3的方法,其特征在于种晶在丙酮与水的体积比为68/32的混合物中进行。
5.根据权利要求2的方法,其特征在于结晶结束时丙酮与水的体积比为70/30-30/70。
6.根据权利要求5的方法,其特征在于结晶结束时丙酮与水的体积比为45/55。
7.根据权利要求3-7中任一项的方法,其中所述结晶于20±5℃进行。
8.根据权利要求2的方法,其中干燥于30-60℃进行。
9.根据权利要求2的方法,其中干燥于0.7kPa压力下于40℃进行。
10.根据权利要求2的方法,其中制备直接于通过在酸性介质中使4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,4S,5R)-3-叔丁氧基羰基-2-(4-甲氧基苯基)-4-苯基噁唑烷-5-甲酸酯脱保护获得的4-乙酰氧基-2α-苯甲酰氧基-5β,20-环氧基-1-羟基-7β,10β-二甲氧基-9-氧代紫杉-11-烯-13α-基(2R,3S)-3-叔丁氧基羰基氨基-2-羟基-3-苯基丙酸酯溶液中进行。
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