Oxidation of 3-substituted 4-R-6-nitro-1-phenyl-1H-indazoles and benzo[d]isoxazoles (R = Ph, CH2CO2Me) gave the corresponding sulfones treatment of which with PhSH-K2CO3 in N-methylpyrrolidone results in replacement of only the RSO2 group in position 4 with the 6-NO2 group remaining intact, contrary to the known sequence of nucleophilic substitution for meta-arranged nucleofuges.
Oxidation of 3-substituted 4-R-6-nitro-1-phenyl-1H-indazoles and benzo[d]isoxazoles (R = Ph, CH2CO2Me) gave the corresponding sulfones treatment of which with PhSH-K2CO3 in N-methylpyrrolidone results in replacement of only the RSO2 group in position 4 with the 6-NO2 group remaining intact, contrary to the known sequence of nucleophilic substitution for meta-arranged nucleofuges.
Oxidation of 3-substituted 4-R-6-nitro-1-phenyl-1H-indazoles and benzo[d]isoxazoles (R = Ph, CH2CO2Me) gave the corresponding sulfones treatment of which with PhSH-K2CO3 in N-methylpyrrolidone results in replacement of only the RSO2 group in position 4 with the 6-NO2 group remaining intact, contrary to the known sequence of nucleophilic substitution for meta-arranged nucleofuges.