Photoaddition of p-quinones to N-(cyclohexyl)dimethylketenimine
Abstract
N-(Cyclohexyl)dimethylketenimine on photoreaction with p-benzoquinone and p-naphthoquinone forms the 1 : 1 adducts 1 -cyclohexyl-5-hydroxy-3,3-dimethylindolin-2-one and 1-cyclohexyl-1,3-dihydro-5-hydroxy-3,-3-dimethylbenz[g]indol-2-one, respectively. A mechanism involving addition and rearrangement is proposed.