Organo-Substituted 1,2-Dihydro-1,2,5-Disilaborepines

✍ Scribed by Wrackmeyer, Bernd ;Maisel, Heidi E. ;Milius, Wolfgang

• Publisher: Wiley (John Wiley & Sons)
• Year: 1997
• Tongue: English
• Weight: 401 KB
• Volume: 130
• Category: Article
• ISSN: 0009-2940
• DOI: 10.1002/cber.19971300928

✦ Synopsis

Di-1-propynyl-tetramethyldisilane (1) reacts with triorganoboranes R,B [R = Et (2a), CH2Ph (2b), Ph (2c), 2-thienyl (2d)], 9-ethyl-9-borabicyclo[3.3. llnonane (3), and diethyl(N-pyrroly1)borane (4) by twofold 1,l-organoboration to give selectively the respective organo-substituted 1,2-dihydro-1,2,5-disilaborepines 5a-d, 6, and 7 in high yields. The compounds 5-7 were characterized by 'H-, llB-, '"C-, and 29Si-NMR spectroscopy in solution. The molecular structures of the disilane 1 and of the heterocycle 5c were determined by X-ray structure analysis.