Intramolecular Photocycloaddition of the 3-(3-Butenyloxy)-2-cyclohexenone System

Article abstract of DOI:10.1246/bcsj.54.3492

The irradiation of 5,5-dimethyl-3-(4-methyl-3-pentenyloxy)-2-cyclohexenone gave regioselectively, 6,6,10,10-tetramethyl-2-oxatricyclo<5.4.0.0^1,5>undecan-8-one, while, that of 5,5-dimethyl-3-<(3-methylcyclohexenyl)methoxy>-2-cyclohexenone afforded, regio- and stereoselectively, 1,5,5-trimethyl-8-oxatetracyclo<8.3.1.0^2,7.0^1,5>tetradecan-3-one.