Journalartikel
Autorenliste: Kozhushkov, SI; Kostikov, RR; Molchanov, AP; Boese, R; Benet-Buchholz, J; Schreiner, PR; Rinderspacher, C; Ghiviriga, I; de Meijere, A
Jahr der Veröffentlichung: 2001
Seiten: 180-183
Zeitschrift: Angewandte Chemie International Edition
Bandnummer: 40
Heftnummer: 1
ISSN: 1433-7851
Verlag: Wiley
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 structure analysis established S4 symmetry for 3 and D2d symmetry for 4, in excellent agreement with the B3LYP/6‐31+G** computed structures.
Abstract: