Synthesis of new fluoro derivatives of o-carborane [3-F-7,8-C2B9H11]−, 3,6-F2-1,2-C2B10H10, and [6,6′-F2-3,3′-Co(1,2-C2B9H10)2]−
摘要:
reduced electron density on the boron atoms bearing fluorine atoms. The 6,6′-difluoro derivative of cobalt bis(dicarbollide) [6,6′-F2-3,3′-Co(1,2-C2B9H10)2]− was obtained from 3-fluoro-nido-carborane [3-F-7,8-C2B9H11]−. The newfluoro derivatives of ortho-carborane were characterized by multinuclear NMR spectroscopy.
描述了一种简单有效的邻碳硼烷选择性笼B(3)多官能化方法。 [3-N 2 - o -C 2 B 10 H 11 ][BF 4 ]与各种亲核试剂反应得到非常广谱的笼型B(3)-取代的邻碳硼烷衍生物,3-X- o - C 2 B 10 H 11 (X = OH、SCN、NH 2 、NO 2 、N 3 、CF 3 、PO(C 6 H 5 ) 2等)。该反应可以作为用于正电子发射断层扫描应用的碳硼烷簇的另一种有效的[ 18 F]-放射性标记方法。
Visible-Light-Promoted Photocatalytic B−C Coupling via a Boron-Centered Carboranyl Radical: Facile Synthesis of B(3)-Arylated<i>o</i>-Carboranes
作者:Da Zhao、Zuowei Xie
DOI:10.1002/anie.201511251
日期:2016.2.24
A visible‐light‐mediated in situ generation of a boron‐centered carboranylradical (o‐C2B10H11.) has been described. With eosin Y as a photoredox catalyst, 3‐diazonium‐o‐carborane tetrafluoroborate [3‐N2‐o‐C2B10H11][BF4] was converted into the corresponding boron‐centered carboranylradical intermediate, which can undergo efficient electrophilic substitution reaction with a wide range of (hetero)arenes