Phenylalkyl-2,3-dihydrobenzofurans and analogs useful as anti-inflammatory agents
申请人:Merck & Co., Inc.
公开号:EP0199235A2
公开(公告)日:1986-10-29
Compounds of formula (I):
and pharmaceutically acceptable salts thererof are disclosed wherein
m is 1 to 4;
n is 2 or 3;
r is 1 to 3;
A is, e.g., phenyl substituted with (R')q wherein q is an integer of 1 to 5 and when there are more than one R', R' can be the same or different from each other and is hydrogen; halo; loweralkoxy; lower alkenoyl; haloloweralkyl; cyano; hydroxyloweralkyl; or hydroxy; and
R, R2 and R3 independently are R'. Those compounds are prepared by (1) nucleophilic substitution involving an appropriately substituted 2,3-dihydrobenzofuranol (or 2,3-dihydrobenzopyranol) and a cinnamylhalide followed by reduction; or (2) by Wittig reaction involving a halomethyl derivative of 2,3-dihydrobenzofuran (or 2,3,-dihydroben- zopyran and an aryl or a heteroaryl aldehyde followed by reduction. These compounds were found to be potent antiinflammatory agents.
式(I)化合物
及其药学上可接受的盐类,其中
m 为 1 至 4
n 是 2 或 3
r 为 1 至 3;
A 是例如被 (R')q 取代的苯基,其中 q 是 1 至 5 的整数,当有多个 R'时,R'可以彼此相同或不同,并且是氢;卤代;低级烷氧基;低级烯酰基;卤代低级烷基;氰基;羟基低级烷基;或羟基;以及
R、R2 和 R3 独立地为 R'。这些化合物是通过以下方法制备的:(1) 2,3-二氢苯并呋喃(或 2,3-二氢苯并呋喃)与肉桂酰卤发生亲核取代反应,然后还原;或 (2) 2,3-二氢苯并呋喃(或 2,3,-二氢苯并呋喃)的卤代甲基衍生物与芳基醛或杂芳基醛发生 Wittig 反应,然后还原。这些化合物被发现是有效的抗炎剂。