Diboration of alkenes and alkynes with a carborane-fused four-membered boracycle bearing an electron-precise B-B bond.
Dalton Trans
; 50(46): 17150-17155, 2021 Nov 30.
Article
em En
| MEDLINE
| ID: mdl-34780587
ABSTRACT
Small ring compounds are fascinating molecules and have been used as valuable compounds in organic synthesis. In this study, a carborane-fused four-membered boracycle bearing an electron precise B-B bond, 1,2-[BBrSMe2]2-o-C2B10H10, was synthesized via the reaction of 1,2-Li2-o-carborane with B2Br4(SMe2)2. This novel boracycle can be used as a "strain-release" compound to achieve diboration of alkenes and alkynes, leading to the generation of ring-expansion products. Interestingly, when bis(trimethylsilyl) acetylene was employed, an allene-functionalized six-membered boracycle was obtained. Moreover, DFT calculations were conducted to shed light on the reaction mechanism.
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MEDLINE
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En
Ano de publicação:
2021
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Article