Synthesis of some di- and tricyclic silaalkanes

✍ Scribed by Zhu Teng; Christoph Boss; Reinhart Keese

• Publisher: Elsevier Science
• Year: 1997
• Tongue: French
• Weight: 653 KB
• Volume: 53
• Category: Article
• ISSN: 0040-4020
• DOI: 10.1016/s0040-4020(97)00841-7

✦ Synopsis

The mono-, di-and spirocyclic silaalkanes 5, 6 and 9/10 are readily prepared from the di-and tetraallylsilanes 4 and 8 respectively by Cp2Zr induced ring forming reactions. The diallylsilole 16 reacts at 0°C and in presence of an excess of Cp2Zr to the tricyclic compound 19 whereas the silaspiro[4.4]nonadienes 21 and 22 are formed at room temperature. High stereoselectivity is observed in all of these Cp2Zr induced cyclization reactions.