Homolytic, Heterolytic, Mesolytic - As You Like It: Steering the Cleavage of a HC(sp<sup>3</sup>)−C(sp<sup>3</sup>)H Bond in Bis(1<i>H</i>-2,1-benzazaborole) Derivatives
作者:Martin Hejda、Antonín Lyčka、Tomáš Mikysek、Roman Jambor、Aleš Růžička、Jaromír Vinklárek、Claudia Wilfer、Alexander Hoffmann、Sonja Herres-Pawlis、Libor Dostál
DOI:10.1002/chem.201602698
日期:2016.10.17
photochemical means, giving corresponding 1Ph‐2R‐1H‐2,1‐benzazaborolyl radicals (Bab‐tBu). and (Bab‐Dipp)., which rapidly self‐terminate. Nevertheless, their formation was unambiguously established by NMR analysis of the reaction mixtures containing products of the self‐termination of the radicals after heating or irradiation. (Bab‐Dipp). radical was also characterized using EPR spectroscopy. Importantly, it
一组的(3,3') -双(1-PH-2-R-1 ħ -2,1-benzazaborole)化合物,其中R =吨卜(BAB-吨丁基)2,R =卜先生(BAB ‐Dipp)2或R = t Bu和Dipp (Bab‐Dipp)(Bab‐ t Bu)合成并使用1 H,11 B,13 C和15 N NMR光谱以及单晶X进行了充分表征射线衍射分析。中心HC(sp 3)-C(sp 3)H键在两个1 H的交界处均受限制的旋转‐2,1–苯并氮杂硼烷环显示出令人着迷的反应性。已证实此键容易mesolytically使用碱金属,以形成相应的芳香1PH-2R-1裂解ħ -2,1-benzazaborolyl阴离子中号+(THF)Ñ(BAB-吨丁基)-(M =锂,钠,K)和K +(THF)n(Bab-Dipp)-。此外,中央HC(SP 3)-C(SP 3)H双键(1 ħ -2,1-benzazaborole)s是也