Synthesis and NMR spectroscopic characterization of Si-substituted 1-silacyclobutene derivatives

• Autorzy: Ezzat Khan , Bernd Wrackmeyer
• Języki publikacji: EN

Abstrakty

EN

Hydroboration of trialkyn-1-yl(organo)silanes with one equivalent and two equivalents of 9-borabicyclo[3.3.1]nonane, 9-BBN afford dialkyn-1-ylsilanes and alkyn-1-ylsilanes, respectively. The alkyn-1-ylsilane derivatives are stable at room temperature and can be store under dry argon for prolong period of time. These compounds are attractive materials for further rearrangements to afford novel 1-silacyclobutene derivatives bearing Si-alkenyl or Si-alkynyl functionalities. The hydroboration reaction is well controlled by the Si-R1 function, i.e., the starting silanes with R1 = Ph selectively afford hydroboration of one Si-C≡C bond with one equivalent of 9-BBN, leaving the other two functionalities untouched. Under mild reaction conditions (25°C), the starting silanes with R1 = Me lead to mixture containing dialkyn-1-ylsilane, alkyn-1-ylsilane and their respective 1-silacyclobutene derivatives. All new compounds are sensitive towards air and moisture and were studied by multinuclear magnetic resonance spectroscopy (1H, 13C, 11B, 29Si NMR) in solution.

Słowa kluczowe

EN

Alkynyl(organo)silanes; Hydroboration; Vinylboration; Silacyclobutenes; NMR

• Czasopismo: Open Chemistry
• Rocznik: 2011
• Tom: 9
• Numer: 1
• Strony: 126-132

Daty

wydano

2011-02-01

online

2010-12-16

Twórcy

autor

Ezzat Khan,

autor

Bernd Wrackmeyer

• Anorganische Chemie II, Universität Bayreuth, D-95440, Bayreuth, Germany

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Identyfikatory

DOI

10.2478/s11532-010-0122-z