(4 + 2), (2 + 2), and Carbene Addition Reactions Involving Cyclohexa-3,5-diene-cis-1,2-diol Derivatives.

The reactions of cis-1,2-isopropylidenedioxycyclohexa-3,5-diene (1) with two N-substituted maleimides, diphenylketene, dichlorocarbene and ethoxycarbonylcarbene are described. Selected reactions of the 3-triflucromsthyl-(2) and 3-fluoro-(3) analogues with these reagents are also reported.