Double and Single Hydroboration of Nitriles Catalyzed by a Ruthenium–Bis(silyl)xanthene Complex: Application to One-Pot Synthesis of Diarylamines and <i>N</i>-Arylimines
作者:Takeo Kitano、Takashi Komuro、Hiromi Tobita
DOI:10.1021/acs.organomet.9b00064
日期:2019.4.8
A ruthenium complex bearing a bis(silyl)xanthene chelate ligand xantsil, i.e. Ru[κ3(Si,O,Si)-xantsil](CO)(PCyp3) (1a, Cyp = cyclopentyl), was found to catalyze both double and single hydroboration reactions of nitriles with pinacolborane (HBpin) and 9-borabicyclo[3.3.1]nonane (9-BBN) to give bis(boryl)amines 2 and N-borylimines 3, respectively, in mostly >99% yields. By combination of these reactions
钌配合物轴承双(甲硅烷基)呫吨螯合配体xantsil,即茹[κ 3(硅,Õ,硅)-xantsil](CO)(PCyp 3)(图1A,的Cyp =环戊基),被发现催化两个双腈与频哪醇硼烷(HBpin)和9-硼环[3.3.1]壬烷(9-BBN)进行单硼氢化反应,分别得到双(硼基)胺2和N-硼嘌呤3,产率大多> 99%。通过将这些反应与随后的钯催化的2和3与1:1的溴代芳烃和KO t混合物进行钯催化的脱硼基C–N偶联反应相结合开发了一锅合成法,从腈制取叔N,N-二芳基胺4和N-芳基亚胺5。