Publication Details (including relevant citation information):
Russ. J. Org. Chem. (Eng. Transl.), 2005, 41, 194-203
Carbonyl ylide generated from methyl cis-3-diazoacetyl-2,2-diphenyl-1-cyclopropanecarboxylate in the presence of Rh2(OAc)4 when brought into reaction of 1,3-dipolar cycloadditionя with N-arylmaleimides afforded substituted 4-aryl-7-methoxy-9,9-diphenyl-12-oxa-4-azatetracyclo-[5.4.1.02,6.08,10]dodecene-3,5,11-triones. Concurrent processes resulted in formation of cycloheptatrienes, hydroxyacetylcyclopropanecarboxylates, and benzophenone. Carbonyl ylide generated from methyl cis-2-diazoacetyl-1-cyclopropanecarboxylate in the same reaction gave rise to exo- and endo-4-aryl-7-methoxy-12-oxa-4-azatetracyclo[5.4.1.02,6 .08,10] dodecene-3,5,11-triones.
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