Masaji Oda

The synthesis of bicyclo[6.2.0]decapentaene

Abstract The parent bicyclo[6.2.0]decapentaene is synthesized for the first time by thermal ring opening of its valence isomer. Thermal dimerization of the compound is also described.

Crystal and molecular structure of 9,10-diphenylbicyclo[6.2.0]decapentaene a 10 π aromatic compound

Abstract X-ray analysis of 9,10-diphenylbicyclo[6.2.0]decapentaene 2b has revealed good planarity of the decapentaene nucleus, remarkably long bond length of the central bond, and appreciably small alternation of the peripheral bonds. It is thus concluded that 2b is a pericyclic 10 π aromatic compound.

The effect of cyclobutene ring annelation on p-benzoquinone: synthesis and properties of 1,2,3,4,5,6-hexahydrobenzo [1,2:4,5]-dicyclobutene-3,6-dione ([2,3:5,6]dicyclobuta-p-benzoquinone)

Abstract The title compound has been synthesized, and the effects of strain imposed by mono- and bis-annelation of cyclobutene ring on p -benzoquinone are clearly observed in the IR carbonyl absorptions, 13 C NMR chemical shifts, and electrochemical reduction potentials.

Rearrangements initiated by trimethylsilyl iodide: ready deoxygenative rearrangement of bicyclo[4.2.0]octane-2,5-diones to bicyclo[3.3.0]oct-1(5)-en-2-ones

Abstract Reaction of bicyclo[4.2.0]octane-2,5-diones with trimethylsilyl iodide gave bicyclo[3.3.0]oct-1(5)-en-2-ones by a clean reductive rearrangement in good yields, providing a simple and effecient synthetic method for the enones.

Magnetic circular dichroism and molecular orbital studies on bicyclo[6,2,0] decapentaene

Abstract The magnetic circular dichroism (MCD) spectrum of bicyclo[6,2,0] decapentaene has revealed four skeletal π → π* electronic transitions in the visible and ultraviolet region. The four MCD bands are assigned to the B2 ← A1, A1 ← A1. B2 ← A1 and A1 ← A1 electronic transitions in increasing order of energy.

Synthesis of Di(7-Cycloheptatrienyl)Ketone

Abstract We here report the synthesis of the title compound which is hitherto unknown and whose chemical and photochemical properties may be of interest.

Preferential photochemical cyclobutane-ring formations of 2-cyclohexene-1,4-dione with olefins and acetylenes. A simple and general synthesis of bicyclo[4.2.0]octane-2,5-diones

Chinon (I) liefert in bekannter Weise das Cyclohexendion (II), das bei der Photolyse in Gegenwart von Cyclohexen (III) das Addukt (IV) gibt.