2,2-dimethyl-propanol; o-nitrobenzenesulfonyl hydrazide; triphenylphosphine; diethylazodicarboxylate in various solvent(s)

[bis(acetoxy)iodo]benzene; iodine in 1,2-dichloro-ethane 2 h; Ambient temperatureIrradiation; Yields of byproduct given;