Catalytic Borylation using an Air-Stable Zinc Boryl Reagent: Systematic Access to Elusive Acylboranes
作者:Jesús Campos、Simon Aldridge
DOI:10.1002/anie.201507627
日期:2015.11.16
The use of borylzinc reagents in palladium‐catalyzed borylation chemistry is described (i.e. a boron analogue of the Negishi coupling), including a one‐pot bench‐top protocol using an air‐ and moisture‐stable bis(boryl)zinc reagent. The steric/electronic properties of the boryl fragment employed enable a systematic method for accessing acylboranes, a rare class of organoboron species with great potential
Assessing the Brønsted Basicity of Diaminoboryl Anions: Reactivity toward Methylated Benzenes and Dihydrogen
作者:Nicole Dettenrieder、Yoshitaka Aramaki、Benjamin M. Wolf、Cäcilia Maichle-Mössmer、Xiaoxi Zhao、Makoto Yamashita、Kyoko Nozaki、Reiner Anwander
DOI:10.1002/anie.201402175
日期:2014.6.10
diaminoboryllithium results in consecutive reactions, involving boryl‐anion‐mediated deprotonation at the benzylic position followed by nucleophilic substitution at the boron center, producing benzylborane species and LiH. Diaminoboryllithium also cleaves H2 heterolytically affording diaminohydroborane and LiH, while the reaction of lithium diaminoboryl(bromo)cuprate with H2 takes place accompanied by reduction