Synthetic Photochemistry. XXX. The Addition Reactions of Cycloheptatriene with Some Aromatic p-Quinones

Article abstract of DOI:10.1246/bcsj.58.1581

The photochemical reactions of cycloheptatriene with p-benzoquinone and 1,4-naphthoquinone yielded the spirocyclic ethers, which had 7-oxabicyclo<4.2.1>nona-2,4-diene structures, by the characteristic (6+2)? cycloaddition process.The latter quinone further produced the carboxylic (2+2)? and (6+2)? cycloadducts.