Fig. 4.

Mechanistic studies. a Reaction of styrene with phenyldiazomethane did not give the desired product; b Reaction of 1,2-diphenylcyclopropane under the standard conditions did not give the desired product; c Reaction of 1-methoxy-4-(3-phenylpropyl)benzene under the standard conditions did not give the desired product; d Radical scavenger, 2,6-di-tert-butyl-4-methylphenol (BHT) added and the reaction was almost unaffected; e N-Ts hydrazone used instead of simple hydrazone did not give the desired product; f H/D exchanges occurred in the isotope experiment