[3,3]Sigmatropic rearrangement of an N-benzoyl-3,6-dihydro-1,2-oxazine derived from ergosteryl acetate and nitrosocarbonylbenzene
Abstract
Nitrosocarbonylbenzene reacts with ergosteryl acetate to give two, isomeric adducts by addition of the nitroso-group to the conjugated diene system; one adduct readily undergoes a [3,3]sigmatropic rearrangement to give a 3-phenyl-5,6-dihydro-1,4,2-dioxazine.