Synthesis and Ring Strain of a Benzoborirene‐
<i>N</i>
‐Heterocyclic Carbene Adduct
作者:Jennifer Hahn、Constanze Keck、Cäcilia Maichle‐Mössmer、Esther von Grotthuss、Paul Niklas Ruth、Alexander Paesch、Dietmar Stalke、Holger F. Bettinger
DOI:10.1002/chem.201804629
日期:2018.12.12
The reduction of an N‐heterocyclic carbene (1,3‐diisopropyl‐4,5‐dimethylimidazolin‐2‐ylidene, IiPr ) adduct of dichloro(ortho‐bromophenyl)borane by tert‐butyl lithium at low temperature yields the IiPr adduct A of parent benzoborirene, a highly strained boron‐containing bicyclic compound. A is unstable at room temperature and dimerizes at low temperature to the bis‐IiPr adduct of 9,10‐dihydro‐9,10‐diboraanthracene
一的还原ñ -杂环卡宾(1,3-二异丙基-4,5- dimethylimidazolin -2-亚基,我我镨 )的二氯加成物(邻溴苯基)甲硼烷由叔丁基锂在低温下产生的I我PR加合物甲父benzoborirene的,高度应变含硼双环化合物。甲在室温下是不稳定的,并且在低温下的双-二聚我我镨9,10-二氢-9,10- diboraanthracene的加成物,其特征在于,单晶X射线晶体学。