C-C Activation to BNB-Embedded Indenophenanthrenes. Electronic Structure and Reactivity

被引：7

作者：

Hu, Chaopeng ^{[1
,2
]}

Guo, Lulu ^{[1
,2
]}

Zhang, Jianying ^{[1
,2
]}

Cui, Chunming ^{[1
,2
]}

机构：

[1] Nankai Univ, State Key Lab Elementoorgan Chem, Tianjin 300071, Peoples R China

[2] Nankai Univ, Coll Chem, Tianjin 300071, Peoples R China

来源：

ORGANOMETALLICS | 2021年 / 40卷 / 08期

基金：

中国国家自然科学基金;

关键词：

B-N; BORYLENE; BORYLATION; REDUCTION; CHEMISTRY; INSERTION; LIGANDS; BOND;

D O I：

10.1021/acs.organomet.0c00807

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The BNB-embedded indenophenanthrenes 3 have been synthesized by reduction of LBX2 (2; L represents a BN phenanthrene ligand and X = Br, Cl) with 2 equiv of potassium graphite under ambient conditions. The formation of 3 very likely goes through an aminoborylene intermediate, which underwent an intramolecular insertion into a C-C bond to close the polycyclic structure. DFT calculations disclosed the delocalized BNB 3c-2e interaction in the BNBC2 five-membered ring of 3. Treatment of 3a with IPr (1,3-diisopropyl-4,5-dimethylimi-dazol-2-ylidene) selectively led to the coordination of IPr to one of two boron atoms, the structure of which has been confirmed by an X-ray single-crystal analysis.

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页码：1015 / 1019

页数：5

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