3. Synthesis and lithiation of γ,γ-difunctionalised ketene dithioacetals. Access to a new synthetic equivalent of a β-hydroxy-β-lithioacrylate. X-Ray molecular structure of 2-(1,3-dithian-2-ylidenemethyl)-1,3-dithiane Edward Dziadulewicz,Melvyn Giles,William O. Moss,Timothy Gallagher,Mary Harman,Michael B. Hursthouse J. Chem. Soc. Perkin Trans. 1 1989 1793