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Radical C(sp2)–H sulfonylation and C(sp2)–N bond oxygenation enabling the chemoselective synthesis of 3‐sulfonyl chromones by using enaminones and sulfonyl hydrazines were accomplished. The domino reactions ran well by using molecular iodine without the assistance of any strong oxidant such as a peroxide or a hypervalent metal salt.
The domino reactions between enaminones and sulfonyl hydrazines enabling novel synthesis of pyrazoline have been achieved by employing water as reaction medium and acetic acid as cheap and green additive are reported. Two new CN and one new CN bonds have been constructed during the formation of these pyrazoline scaffolds. Unlike the conventional formation of pyrazoles in the organic solvent mediated...
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