H. Pellissier et M. Santelli, STEREOSELECTIVE ALLYLSILANE ADDITIONS TO ALPHA-DIKETONE DIKETALS, Journal of the Chemical Society, Chemical Communications, (6), 1995, pp. 607-608
Titanium tetrachloride mediated addition of allyltrimethylsilane to al
pha-diketone diketals ,6-dialkyl-2,5,7,10-tetraoxabicyclo[4.4.0]decane
s) leads to 2,3-dialkyl-2,3-dialkyl-1,4-dioxanes with very high diaste
reoselectivity involving an invertive (S(N)2-like) substitution.