A process for preparing an intermediate compound of formula (II)
where X is as defined in the specification, R1 is haloalkyl, alkyl, alkenyl, cycloalkyl, carboxyalkyl, alkoxycarbonylalkyl, aryl or arylalkyl;
R2, R3, R4 and R5 are organic groups as defined in the specification, which process comprises aromatisation of a compound of formula (III)
where R1, R2, R3, n, X and R5 are as defined in relation to formula (II) and R4' is a group R4 or a precursor group thereof, and thereafter if necessary or desired, carrying out one or more of the following steps: (i) removing any hydroxy protecting groups R; (ii) converting a precursor group R4' to a group R4, or where R4' is a group R4, converting it to a different such group.
Compounds obtained are useful intermediates for example in the preparation of fulvestrant. Novel intermediates are also claimed.
一种制备式 (II) 中间体化合物的工艺
其中 X 如说明书中所定义,R1 为卤代烷基、烷基、烯基、环烷基、羧基、烷氧基羰基、芳基或芳烷基;
R2、R3、R4 和 R5 是如说明书中定义的有机基团,该工艺包括式 (III) 化合物的芳香化反应
其中 R1、R2、R3、n、X 和 R5 如式 (II) 所定义,R4'为基团 R4 或其前体基团,此后如有必要或需要,进行以下一个或多个步骤:(i) 去除任何羟基保护基团 R;(ii) 将前体基团 R4' 转化为基团 R4,或在 R4' 为基团 R4 的情况下,将其转化为不同的此类基团。
获得的化合物是有用的中间体,例如用于制备
氟维司群。本发明还要求得到新的中间体。