Functional<i>carbo</i>-Butadienes: Nonaromatic Conjugation Effects through a 14-Carbon, 24-π-Electron Backbone
作者:Arnaud Rives、Valérie Maraval、Nathalie Saffon-Merceron、Remi Chauvin
DOI:10.1002/chem.201303169
日期:2014.1.7
X‐ray crystallography shows that all of the acyclic DBAs adopt a planar trans–transoid–trans configuration. The maximum UV/Vis absorption wavelength is found to vary consistently with the overall π‐conjugation extent and, more intriguingly, with the π‐donor character of the aryl X substituents, which varies consistently with the first (reversible) reduction potential and first (irreversible) oxidation
的系统性研究碳氮化未嵌入芳香族丁二烯基序碳氮化苯环进行说明。Dibutatrienylacetylene(DBA)靶向ř 1 C(R)CCC(PH) C≡C C(PH)CCC(R) - [R 2被设计,其中R是C SiCSi i Pr 3和R 1和R 2是R,H或4-X-C 6 H 4,后者包括三个已知的代表(X:H,NMe 2或NH 2)。合成方法基于SnCl 2-通过早期或晚期分歧策略制备的戊炔二醇的减少; 后者允许使用OMe-NO 2推挽式二芳基DBA。如果R 1和R 2为H,则分离出带有两个烯基帽的过度还原的二炔基三丁烯(DAB)而不是未取代的DBA。如果R 1 = R 2 = R,获得tetraalkynyl-DBA目标,连同具有12元1,2-亚烷基-1的过度还原产物DBA ħ 2,2 ħ 2 -碳氮化-cyclobutadiene环。X射线晶体学表明,所有的非循环的DBA采用平面反式-