Synthesis and Some Properties of 8,8′-Diheptafulvenyl Ketone

Abstract

8,8′-Diheptafulvenyl ketone has been synthesized, and its uv, ir, and nmr spectra were demonstrated, from which it can be concluded that a dipolar structure would largely contribute for the ground state, Some chemical properties of the compound has also been studied.

A Bis(heptafulvenyl)-dicyanoethylene Thermoswitch with Two Sites for Ring Closure

“…Because of the unreliable oxidations of 4 , we decided to postpone the Knoevenagel condensation to the last step (Scheme ). First, the 8,8′-diheptafulvenyl ketone 9 was prepared according to a previously reported route from 1,3-bis(cycloheptatrienyl)acetone . Unfortunately, however, a condensation with malononitrile did not provide the desired VHF 1 , but only decomposition.…”

8-Oxoheptafulvene

“…No scrambling Intramolecular rearrangement (30) 840 the phenylcyclobutanone derivatives, (27) and (28), respectively. These results indicate that a suitably located double bond is necessary to rearrange to the cyclopentanone derivatives.…”