Synthesis and spasmolytic activities of 2-(1,2-benzisoxazol-3-yl)-3{[.omega.-(dialkylamino)alkoxy]phenyl}acrylonitriles

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Abstract
Several 2-(1,2-benzisoxazol-3-yl)-3-[[.omega.-(dialkylamino)alkoxy]phenyl]acrylonitrile derivatives were synthesized and screened for potential spasmolytic activity. The effect of structural variation of these molecules on biological activities was systematically examined. Among these compounds, (Z)-2-(1,2-benzisoxaxol-3-yl)-3-[2-(2-piperidinoethoxy)-phenyl]acrylonitrile (1d), (Z)-2-(1,2-benzisoxazol-3-yl)-3-[2-(2-morpholinoethoxy)phenyl]acrylonitrile (1f), and their analog having a methoxy substitutent at C5 of the benzoisoxazole ring showed potent antispasmodic activities in the in vitro and in vivo [guinea-pig ileum] studies.