Abstract Surprising symmetry, surprising synthesis: Dicyclopropyldiethenylmethane (2), prepared from dicyclopropylketone (1) in several steps, was successfully cyclopropanated with a large excess of diazomethane in the presence of palladium (II) acetate yielding the structurally interesting tetracyclopropylmethane (3; 92% yield). Upon catalytic hydrogenation, 3 was quantitatively converted into tetraisopropylmethane (4). X-ray ...
[Anderson, J. Edgar; De Meijere, Armin; Kozhushkov, Sergei I.; Lunazzi, Lodovico; Mazzanti, Andrea Journal of the American Chemical Society, 2002 , vol. 124, # 23 p. 6706 - 6713]