Le dimésitylnéopentylsilène, un silène stable et facile à préparer synthèse et aspects de sa réactivité

The dimesitylneopentylsilene Mes 2 Si  CHCH 2 t Bu 1 is obtained in almost quantitative yield by reaction of tert-butyllithium with dimetisylvinylfluorosilane 4 ; 1 is certainly one of the most easily available stable silenes. In spite of its stability, 1 presents a high reactivity in the field of classical chemistry of organometallic alkenes such as addition or cycloaddition reactions and, in some cases, an original behaviour of ene-reagent (towards benzaldehyde) and both ene- and enophilic-reagent (towards acetophenone).