Functional group chemistry at intramolecular frustrated Lewis pairs: substituent exchange at the Lewis acid site with 9-BBN
作者:Markus Erdmann、Christian Rösener、Thorsten Holtrichter-Rößmann、Constantin G. Daniliuc、Roland Fröhlich、Werner Uhl、Ernst-Ulrich Würthwein、Gerald Kehr、Gerhard Erker
DOI:10.1039/c2dt31737k
日期:——
Lewis pair (FLP) Mes2PCH2CH2B(C6F5)2 reacts with 9-borabicyclo[3.3.1]nonane (9-BBN) by C6F5vs. H exchange at boron to give the new [B]–H functionalized FLP Mes2PCH2CH2B(H)(C6F5) (4) and 9-C6F5–BBN. The latter was characterized as an isonitrile adduct by X-ray diffraction. The new FLP 4 forms an adduct with pyridine and it undergoes clean hydroboration reactions with 1-pentyne or added styrene or di
邻位沮丧的P / B Lewis对(FLP)Mes 2 PCH 2 CH 2 B(C 6 F 5)2通过C 6 F 5 vs. H交换与9-硼环[3.3.1]壬烷(9-BBN)反应在硼中得到新的[B] –H功能化的FLP Mes 2 PCH 2 CH 2 B(H)(C 6 F 5)(4)和9-C 6 F 5 –BBN。通过X射线衍射将后者表征为异腈加合物。新的FLP 4与吡啶形成加合物,并与1-戊炔或添加的苯乙烯或二甲基乙烯基乙烯基膦进行清洁的硼氢化反应。产物与吡啶形成稳定的加合物。X射线晶体结构分析也表征了两个这样的例子。用Al / N基路易斯对,iBu 2 Al–(Me 3 Si)C C(H)–N(CH 2 CH 2)2 NMe(14)处理时,观察到类似的烷基-氢交换。-BBN。