Novel phenoxyalkylamine derivatives. V. Synthesis, .ALPHA.-blocking activity and quantitative structure-activity analysis of .ALPHA.-((phenoxyethylamino)propyl)-.ALPHA.-phenylacetonitrile derivatives.
作者:KAZUYA MITANI、SHUNICHIRO SAKURAI、TOSHIHIRO SUZUKI、KOJI MORIKAWA、EIICHI KOSHINAKA、HIDEO KATO、YASUO ITO、TOSHIO FUJITA
DOI:10.1248/cpb.36.4121
日期:——
α-[(Phenoxyethylamino) propyy]-α-phenylacetonitrile derivatives possessing various substituents on the benzene ring (A ring) at the phenylacetonitrile moiety, on the quaternary carbon atom and on the benzene ring (B ring) at the phenoxy moiety, and exhibiting various degrees of ablocking activity, were prepared. The variations in the activity were analyzed qualitatively as well as quantitatively by using physicochemical substituent parameters and a regression technique. The effect of substituents on the A ring was rationalized in terms of a parabolic function of their hydrophobic parameter. As regards substituents on the quaternary carbon atom, alkyl groups were desirable for high activity. The effects of substituents on the B ring were such that an optimum hydrophobic condition exists and that an alkoxy substituent at the o-position as well as smaller substituents at the m-and p-positions are favorable for high activity. The analysis for the combined series of analogs where substituents on the A and B rings are varied showed the existence of an optimum hydrophobicity for the whole molecule for the transport process of the molecule, besides above-mentioned various position-specific structural effects.
合成了α-[(苯氧乙基氨基)丙基]-α-苯基乙腈衍生物,这些衍生物在苯乙腈部分的苯环(A环)上、在四面体碳原子上,以及在苯氧部分的苯环(B环)上,具有不同的取代基,并表现出各种程度的α-阻断活性。采用物理化学取代基参数及回归技术,对活性的变化进行了定性和定量分析。A环上取代基的影响根据其疏水参数的抛物线函数进行合理化。至于四面体碳原子上的取代基,烷基基团被认为是高活性的理想选择。B环上取代基的影响表明,存在一个最佳的疏水条件,并且在邻位的烷氧取代基以及在间位和对位的较小取代基有利于高活性。针对A环和B环取代基变化的综合系列类似物的分析显示,在分子的运输过程中,整个分子的最佳疏水性存在,此外也考虑了上述不同位置特异的结构效应。