H. Pellissier et al., SAKURAI REACTION ADDITION OF 1,8-BIS(TRIMETHYLSILYL)-2,6-OCTADIENE TOALPHA,BETA-ENONES - A ONE-STEP CONTROL OF 4 STEREOGENIC CARBON CENTERS, Journal of organic chemistry, 63(7), 1998, pp. 2148-2153
The addition reaction of 1,8-bis(trimethylsilyl)-2,6-octadiene with op
en-chain conjugated enones in the presence of titanium tetrachloride a
ffords 4,7-divinyldecane-1,10-diones with very high diastereoselectivi
ty. In the case of benzalacetone (trans-4-phenyl-3-buten-2-one), the s
tructure of the adduct (74% yield) was established as the meso isomer
,9R*)-4,9-diphenyl-5,8-divinyldodecane-2,11-dione by a single-crystal
X-ray analysis.