A compound of the formula (I):
wherein:
X is O, S or H2;
Yis-CH2-CH2 -CH = CH- or C≡C-;
n is 1 to 7;
R, is C1-4alkyl;
R3 is hydroxy or protected hydroxy;
R4 is C1-9 alkyl, C3-8 cycloalkyl or C3-8 cycloalkyl-C1-6 alkyl; or
R2 and R4 taken with the carbon atom to which they are joined represent a C5-8 cycloalkyl group; and R5 is hydrogen or C1-6 alkyl; and salts thereof have useful pharmaceutical activity including bronchodilator activity. A method for the preparation is given.
式 (I) 的化合物:
其中
X 是 O、S 或 H2;
Yis-
CH2- -CH = CH- 或 C≡C-;
n 是 1 至 7;
R 是 C1-4 烷基
R3 是羟基或受保护的羟基;
R4是C1-9烷基、C3-8环烷基或C3-8环烷基-C1-6烷基;或
R2 和 R4 与它们连接的碳原子一起代表 C5-8 环烷基;R5 是氢或 C1-6 烷基;其盐类具有有用的药物活性,包括支气管扩张剂活性。本文给出了一种制备方法。