Investigations on the reactivity profile of the transient five-membered-ring cyclic carbonyl ylides, generated from α-diazo ketones, in the presence of the C O group of various simple ketones and symmetrical/unsymmetrical 1, 2-diones were carried out. The reaction of α- diazo ketones with 1, 2-naphthoquinone furnished interesting diastereomeric cycloadducts in which both the C O groups acted as dipolarophilic sites. The similar reaction in the ...
