9-Hydroxy-pyrido[1,2-a]pyrimidin-4-one ether derivatives

摘要

PCT No. PCT/EP94/03804 Sec. 371 Date May 3, 1996 Sec. 102(e) Date May 3, 1996 PCT Filed Nov. 16, 1994 PCT Pub. No. WO95/14691 PCT Pub. Date Jun. 1, 1995The present invention is concerned with novel compounds having the formula <IMAGE> (I) the pharmaceutically acceptable acid addition salts thereof and the stereochemically isomeric forms thereof, wherein Alk represents C1-4alkanediyl; D is a bicyclic heterocycle of formula <IMAGE> (a) orC2-6alkenyl; C2-6alkynyl; C3-6cycloalkyl optionally substituted with C1-4alkyl; C1-19alkyl optionally substituted with C3-6cycloalkyl, halo, C1-6alkyloxy or cyano; and each R2 independently is hydrogen or C1-4alkyl. Novel compounds; compositions; processes for preparing novel compounds and intermediates are described.