Novel phenoxyalkylamine derivatives. IV. Synthesis, Ca2+-antagonistic activity and quantitative structure-activity analysis of .ALPHA.-isopropyl-.ALPHA.-(3-(3-(3-methoxyphenoxy)propylamino)propyl)-.ALPHA.-phenylacetonitrile derivatives.
摘要:
制备了α-异丙基-α-[3-[3-(3-甲氧基苯氧基)丙氨基]丙基]-α-苯乙腈衍生物,并评估了它们的 Ca2+ 拮抗活性。在这些化合物中,发现在 A 环上具有 m-OMe、p-F、p-Cl、3,4-(OMe) 2 和 3,5-(OMe) 2 取代基的 N-Me 衍生物比维拉帕米具有更高的 Ca2+ 拮抗活性。利用物理化学取代基参数和回归分析对 A 环上取代基的影响进行了定量研究。分析结果表明,π值接近于零的取代基对活性有利,而 m 和 p 取代基存在最佳立体条件,相当于 m-OMe 和 p-F 或 p-Cl。对同时改变 A 环、苯氧基苯环(B 环)和季碳原子上的取代基的全系列类似物进行的分析表明,除了特定位置的立体效应和疏水效应外,还存在最佳的分子疏水性,这可能参与了向作用部位的迁移过程。
Enantioselective Rhodium-Catalyzed Allylic Substitution with a Nitrile Anion: Construction of Acyclic Quaternary Carbon Stereogenic Centers
作者:Ben W. H. Turnbull、P. Andrew Evans
DOI:10.1021/jacs.5b02810
日期:2015.5.20
A direct and highly enantioselective rhodium-catalyzed allylicalkylation of allyl benzoate with α-substituted benzyl nitrile pronucleophiles is described. This simple protocol provides a new approach toward the synthesis of acyclic quaternary carbon stereogenic centers and provides the firstexample of the direct asymmetricalkylation of a nitrile anion. The synthetic utility of the nitrile products
Enantioselective Rhodium-Catalyzed Allylic Alkylation of Prochiral α,α-Disubstituted Aldehyde Enolates for the Construction of Acyclic Quaternary Stereogenic Centers
作者:Timothy B. Wright、P. Andrew Evans
DOI:10.1021/jacs.6b10099
日期:2016.11.30
highly enantioselective rhodium-catalyzed allylic alkylation of prochiral α,α-disubstituted aldehyde enolates with allyl benzoate is described. This protocol provides a novel approach for the synthesis of acyclic quaternary carbon stereogenic centers and it represents the first example of the direct enantioselective alkylation of an aldehyde enolate per se. The versatility of the α-quaternary aldehyde