4-(aryl-substituted)-piperidines as neurokinin receptor antagonists
申请人:ZENECA LIMITED
公开号:EP0630887A1
公开(公告)日:1994-12-28
The present invention concerns the novel aryl substituted heterocycles of formula I, set out below,
wherein R², R³ and R⁴ have the values defined herein, which antagonize the pharmacological actions of one of the endogenous neuropeptide tachykinins at the neurokinin 2 (NK2) receptor making them useful whenever such antagonism is desired, such as in the treatment of asthma and related conditions. The invention also provides pharmaceutical compositions containing the aryl substituted heterocycles for use in such treatment, methods for their use, and processes and novel intermediates for their manufacture.
The present invention concerns the novel use of aryl substituted heterocycles of formula I, set out below, which antagonize the pharmacological actions of one of ent endogenous neuropeptide tachykinins an the neurokinin 2 (NK2) receptor making them useful whenever such antagonism is desired, such as in the treatment of asthma and related conditions. The invention also provides pharmaceutical compositions containing the aryl substituted heterocycles for use in such treatment. Certain novel aryl substituted heterocycles of formula I and novel intermediates for their manufacture are also provided. ##STR1##
Investigation of an Alternative Route to ZD3638 and Cost-Benefit Analysis Comparison of Raw Materials with the Previous Route
作者:Jonathan D. Moseley、William O. Moss、Matthew J. Welham
DOI:10.1021/op0000935
日期:2001.9.1
A convergent synthesis to ZD3638 was proposed starting with alternative raw materials. A cost-benefit analysis for the new route was performed which demonstrated that significant savings in raw materials costs could be made over the previous linear sequence. The convergent route was then proved in principle by experimental work. LiTMP was shown to be a superior base to LDA in the modified lithiation reaction.