C–H Functionalization of BN-Aromatics Promoted by Addition of Organolithium Compounds to the Boron Atom
作者:Alberto Abengózar、Miguel Angel Fernández-González、David Sucunza、Luis Manuel Frutos、Antonio Salgado、Patricia García-García、Juan J. Vaquero
DOI:10.1021/acs.orglett.8b02040
日期:2018.8.17
Addition of an organolithium compound to a BN-phenanthrene with embedded B and N atoms is proposed to result in coordination of RLi to the boron atom. This coordination, supported by NMR spectroscopy and DFT calculations, increases the nucleophilicity of the system in the β position to the N atom and is therefore a useful tool for promoting regioselective C–H functionalization of BN aromatics.
the conjugated backbone was applied to facilely synthesize fold-line, coplanar BN-embeddedpolycyclicaromatic hydrocarbons from simple small BN compounds. The molecular structures and packing modes of these BN-embedded acenes were confirmed by single-crystal X-ray diffraction. Their electronic and photophysical properties were studied by using UV-vis, fluorescence spectroscopy, electrochemical cyclic
Synthesis, Optical Properties, and Regioselective Functionalization of 4a-Aza-10a-boraphenanthrene
作者:Alberto Abengózar、Patricia García-García、David Sucunza、Luis Manuel Frutos、Obis Castaño、Diego Sampedro、Adrián Pérez-Redondo、Juan J. Vaquero
DOI:10.1021/acs.orglett.7b01435
日期:2017.7.7
which has been explained by means of computational studies that found a low energy conical intersection for the nonradiative deactivation of the excited state. Moreover, a completely regioselectivefunctionalization of 4a-aza-10a-boraphenanthrene at C-1 by reaction with activated electrophiles has been achieved.