Reactivity of C,N-chelated organoboron compounds with lithium anilides – formation of unexpected 1,2,3-trisubstituted 1H-2,1-benzazaboroles
作者:Martin Hejda、Antonín Lyčka、Roman Jambor、Aleš Růžička、Libor Dostál
DOI:10.1039/c3dt32850c
日期:——
3-trisubstituted 1H-2,1-benzazaboroles 6–11, whose structures were unambiguously established by single crystal X-ray diffraction analysis (except for 11) and multinuclear NMR spectroscopy. In contrast, compounds 4 and 5 were inert towards ArNHLi. The investigation dealing with the reaction mechanism between the parent boranes 1–3 and ArNHLi revealed that amidolithiation of the CN double bond involved in the
一组包含各种C,N-螯合配体L 1–3(其中L 1 = [ o-(CH N t Bu)C 6 H 4 ],L 2 = [ o-(CH )的C,N-分子间配位的硼烷N-2,6-iPr 2 C 6 H 3)C 6 H 4 ],L 3= [邻-(CH 2 NMe 2)C 6 H 4 ]);L 1–3 BCl2(对于1 L = L 1,对于2 L = L 2,对于5 L = L 3),合成了L 1 BPhCl( 3)和L 1 BCy 2( 4)(其中Cy =环己基),并通过多核NMR光谱,以及在1和3–5情况下通过单晶X射线衍射分析。的反应1-3与N-酰苯胺ArNHLi(AR = 2,6-ME 2 ç 6 ħ 3或2,6-的iPr 2 C ^ 6 ħ 3)通过在C N键上意外添加苯胺,得到1,2,3-三取代的1 H -2,1-苯并氮杂硼烷6-11,其结构通过单晶X射线衍射分析明确确定(11除外)和