Additions to Dienone 3. Dithiane Adduct 4. A solution of 2.08 g (10.0 mmol) of dienone 3 in 20 mL of THF was added over 0.5 h to 2-lithio-1, 3-dithiane (from 1.24 g= 10.3 mmol of dithiane and 10.7 mmol of n-BuLi) at-100" C. After the solution was warmed to-15" C, the reaction mixture was allowed to stand for 42 h and was quenched with saturated NH4Cl solution. The reaction mixture was then partitioned between ether and water; the organic ...
