Abstract
A novel series of 2,2-dibromo-3-aryl-1'-phenyl-6’,7'-dihydrospiro[cyclopropane-1,5'-indazol]-4'(1'H)-ones derivatives were prepared in moderate to good yields by conjugate addition of bromoform to (E)-5-arylmethylene-1-phenyl-6,7-dihydro-1H-indazol-4(5H)-ones in the presence of magnesium under N2. The structures of all the products were characterised by 1H NMR, 13C NMR, IR spectroscopy, elemental analysis and mass spectrometry.
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