Unsymmetrical Diborane(4) Derivatives: A Comparative Study
Unsymmetrical Diborane(4) Derivatives: A Comparative Study
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DOI：
10.1002/ejic.201700545
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发表时间：
2017-10-25
影响因子：
2.3
通讯作者：
Kleeberg, Christian
中科院分区：
文献类型：
--
作者：
Borner, Corinna;Wiecha, Maximilian T.;Kleeberg, Christian
自2010年由Suginome等人引入以来，pinB-Bdan [pin = OCMe 2CMe 2 O，dan =（NH）（2）（C10 H6）]已成为各种区域选择性（双）硼化反应中的有价值的试剂，并且相关的不对称乙硼烷（4）衍生物已被用作二氨基硼基络合物的通用前体。然而，所用的不对称乙硼烷（4）衍生物显示二醇和二胺部分的变化很小。本研究扩展了这类化合物，并报道了不对称二硼烷（4）衍生物[C2 H4（tBuN）（2）]B-B（NMe 2）（2）和[C2 H4（tBuN）（2）]B-B（NMe 2）Cl的合成，以及[C6 H4（HN）（2）]B-B（O2 C5 H10），[C6 H4（HN）（2）] B-B（O2 C2 H4），和[C6 H4（HN）（2）]B-B[O2 C6 H2（C2 H9）（2）]，它们说明了二醇部分的可变性。所有化合物的充分表征，包括单晶X-射线衍射研究允许第一次比较讨论这类化合物的光谱和结构特性。
Since its introduction in 2010 by Suginome et al., pinB-Bdan [pin = OCMe2CMe2O, dan = (NH)(2)(C10H6)] has become a valuable reagent in various regioselective (bis-)borylation reactions, and related unsymmetrical diborane(4) derivatives have been used as versatile precursors for diaminoboryl complexes. However, the unsymmetrical diborane(4) derivatives employed show little variation of the diol and diamine moieties. The present study expands this class of compounds and reports the synthesis of unsymmetrical diborane(4) derivatives [C2H4(tBuN)(2)]B-B(NMe2)(2) and [C2H4(tBuN)(2)]B-B(NMe2)Cl, bearing a sterically demanding non-aromatic diamine moiety, as well as [C6H4(HN)(2)]B-B(O2C5H10), [C6H4(HN)(2)]B-B(O2C2H4), and [C6H4(HN)(2)]B-B[O2C6H2(C2H9)(2)], which illustrate the variability of the diol moiety. Fully characterization of all compounds including single-crystal X-ray diffraction studies allows for the first time a comparative discussion of the spectroscopic and structural properties of this class of compounds.