Synthesis and Chiroptical Properties of Hexa-, Octa-, and Deca-azaborahelicenes: Influence of Helicene Size and of the Number of Boron Atoms
作者:Chengshuo Shen、Monika Srebro-Hooper、Marion Jean、Nicolas Vanthuyne、Loïc Toupet、J. A. Gareth Williams、Alexis R. Torres、Adrian J. Riives、Gilles Muller、Jochen Autschbach、Jeanne Crassous
DOI:10.1002/chem.201604398
日期:2017.1.5
hexa‐, octa‐, and deca‐helicenes (1 a–d) have been prepared in enantiopure form, along with two cycloplatinated deca‐helicenes (1 d′, 1 d1), further extending the family of cycloplatinated hexa‐ and octa‐helicenes reported previously. The azabora[n]helicenes display intense electronic circular dichroism and large optical rotations; the dependence of the optical activity on the size of the helix (n=6, 8
已经以对映纯形式制备了新一类环硼化的六,八和十螺旋体(1 a – d)的四个成员,以及两个环铂十螺旋(1 d',1 d 1),并进一步扩展了以前报道过的环铂六和八螺旋烯家族。映山红[ n ]螺旋显示出强烈的电子圆二色性和大的旋光度。光学活性对螺旋线大小的依赖性(n =6、8、10)和硼原子数(1或2)已通过实验和理论进行了详细研究。已经测量了这些新型荧光有机螺旋的光物理性质(非偏振和圆偏振发光),并将其与相应的有机金属磷光环铂衍生物(1 a 1 – d 1)进行了比较。