Bis(trimethylsilyl)-1,3 alcynes-1 : Preparation a partir de silanes propargyliques et application a la synthese de silanes alleniques α-fonctionnels

✍ Scribed by Jacques Pornet; Danielle Mesnard; Léone Miginiac

• Book ID: 104221673
• Publisher: Elsevier Science
• Year: 1982
• Tongue: French
• Weight: 319 KB
• Volume: 23
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(00)88353-7

✦ Synopsis

1,3-b~s(trimethylsilyl~-1-alkynes may be obtained from trlmethylsilylpropargylsrlanes by metallation wrth n-butylllthrum following by reaction with trlmethylsilylchlorr.de ; these silanes easily react with acetals, in the presence of titanium tetrachloride, to produce a-functional allenyltrimethylsilanes. Les propargylsilanes agissent avec transposition propargylique sur les reactifs electrophiles, en presence de catalyseurs (l-13). Nous etudions icl la synthese et la reactivate vls-&-vis des acetals de bls(trfmethylsilyl)-1,3 alcynes-1 : (C~~)~si-CH(R)-CsC-sl(Cfi~l~ 1" Synthese de bis(trlmCthvlsilyl)-1,3 alcynes-1 Ces sllanes peuvent se former lors de la silylatlon de dilithlo-1,3 alcynes C R-CH-CsC L12,