申请人:PHARMACIA & UPJOHN S.p.A.
公开号:EP1116718A2
公开(公告)日:2001-07-18
The invention refers to a process for the preparation of compounds of formula ( I )
wherein
R1 is an aryl or heteroaryl group;
R2 is hydrogen, arylcarbonyl, heteroarylcarbonyl or C1-C6 alkoxycarbonyl;
R3 is hydrogen or acetyl;
the process comprising reacting a compound of formula (II)
wherein
R1 is as defined above, the symbol --- represents a single or a double bond, R7 is C1-C6 alkoxycarbonyl, arylcarbonyl or heteroarylcarbonyl, each of R4 and R5 independently is hydrogen, C1-C6 alkyl, C1-C3 alkoxy, aryl or heteroaryl;
and R6 is C1-C6 alkyl, aryl or heteroaryl, provided that when the symbol --- is a double bond, R7 and R4 do not exist and R5 is aryl or heteroaryl, with a compound of formula (III)
wherein each of R8 and R9 independently is a hydroxy protecting group in the presence of a condensing agent so obtaining a compound of formula (IV)
wherein
R1, R4, R5, R7, R8 and R9, and the symbol --- are as defined above, provided that when --- is a double bond R7 and R4 do not exist and R5 is aryl or heteroaryl, and deprotecting the compound of formula (IV) under such condition so as to produce the compound of formula (I), as defined above, and optionally transforming a compound of formula (I) into another compound of formula (I).
The compounds of formula (II) are also claimed.
The compounds of formula (I) are antitumoral compounds.
本发明涉及一种制备式 ( I ) 化合物的工艺
其中
R1 是芳基或杂芳基;
R2 是氢、芳基羰基、杂芳基羰基或 C1-C6 烷氧基羰基;
R3 是氢或乙酰基;
该工艺包括使式(II)化合物反应
其中
R1 如上定义,符号----代表单键或双键,R7 是 C1-C6 烷氧羰基、芳基羰基或杂芳基羰基,R4 和 R5 各自独立地是氢、C1-C6 烷基、C1-C3 烷氧基、芳基或杂芳基;
和 R6 是 C1-C6 烷基、芳基或杂芳基,条件是当符号----是双键时,R7 和 R4 不存在,R5 是芳基或杂芳基,具有式 (III) 的化合物
其中 R8 和 R9 各自独立地为羟基保护基团,在缩合剂存在下,得到式(IV)化合物
其中
R1、R4、R5、R7、R8 和 R9 以及符号----如上文所定义,但当----为双键时,R7 和 R4 不存在,且 R5 为芳基或杂芳基,在这样的条件下对式(IV)化合物进行脱保护,从而生成如上文所定义的式 (I)化合物,并可选择地将式(I)化合物转化为另一种式(I)化合物。
还要求得到式(II)化合物。
式(I)化合物是抗肿瘤化合物。