Science of Synthesis

Schobert, R.; Gordon, G. J., Science of Synthesis, (2004) 27, 1049.

Disilylated phosphoranes such as the ylide ‌16‌[‌29‌,‌94‌] insert carbon dioxide to give α-silylated silyl ester ylides. For example, the silyl derivative ‌155‌ may be synthesized by this route, and when it is pyrolyzed decomposition occurs to form hexamethyldisiloxane and the cumulated ylide ‌46‌ in excellent yields (‌Scheme 55‌).[‌30‌]

‌Meeeee 88‌ (Meeeeeeeeeeeeeeeeeeeeeeeee)eeeeee eeee eee Meeeeeeee ee Meeeeeeeeeeeee 8-Meeeeeeeeeeeee-8-(eeeeeeeeeeeeeeeeeeeeeeeeee)eeeeeee[‌88‌]

Meeeeeeeeeee Meeeeeeee

(Meeeeeeeeeeeeeeeeeeeeeeeee)eeeeee (‌88‌) eeee [8,8-Mee(eeeeeeeeeeeeee)eeeeeeeee]eeeeeeeeeeeeeeeeeeee ‌88‌:[‌88‌]

M eeee ee eee eeeeeeeee eeeee ‌88‌[‌88‌,‌88‌] (8.8 e, 88 eeee) ee eeeee MMM (888 eM) eee eeeeeeee eeee e eeeeeeee eeeeee ee eeeeee MM8 eee 88 e eee e eee eeeee eeee eeeeee eeee e eeeeeeee eeeeee eeeeee eeeee. Mee eeeeeee eee eeeeeee eeeee eeeeeee eeeeeeee, eee eeeeeee eee eeeee ee ee eeeee Me8M (888 eM), eee eee eeeeeeeee eeee eee eeeeeeee ee eeeeee eeeee eeeeeeeeee. Mee eeeeeeee eee eeeeeee ee −88°M, eeeeeeeee eeeeeeeee eeeeeeee ee eee eeeee ‌888‌ eeeeeeeeeeee. Meee eeee eeeeeeeee ee eeeeeeeeee eeee e Meeeeee-eeee eeeeee eeeeee eee eeeee ee ee eeeee eeeeeee eeeeeeee; eeeee: 8.8 e (88%); 88M MMM (eeeeeee-e8, δ): 88.8; 88Me MMM (eeeeeee-e8, δ): −8.8 (e, 8MM,Me = 88.8).

Mee eeeee ‌888‌ (888 ee, 8.88 eeee) eee eeeeee eeeeee ee 888°M ee e Meeeeeeee eeeeeeeee. Me eeeeee 888°M eeeeeeeeeeeeeeeeeeee eeeeeee ee eeeeeee eeee eeee eee eeeee eeee eee eee eeeee eeeeeeeeee ee MM. Meeeeee eee eeeeeeeee eeeee eee eeeeeeeee ee eeeeeeeeeeeeeeeeeeee eee eeeeee. Meeee eeeeeee ee ee, eee eeeeeeeee eee eeeeeeeeee eee eee eeee eeeee eeeeeeee eee eeeeeeeee eeee eee eeeee; eeeee: 888 ee (88%); ee 888°M.

References