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- W4313311942 abstract "Abstract A powerful CuCl‐catalyzed sequential one‐pot reaction of aryl methyl ketoxime acetates with cyclic N‐sulfonyl imines followed by elimination in the presence of base is reported. This hydrazine‐free method conveniently makes C−C and N−N bonds via a radical cleavage of the N−O bond, delivering a special class of C3‐hydroxyarylated pyrazoles in good yields. Surprisingly, while employing CuI as a catalyst instead of CuCl, the reaction proceeds through a non‐radical pathway which embodies a new tactic for the high‐yielding access to value‐added conjugated N‐unsubstituted ketimines. Moreover, additive‐free approach to sulfamidate‐fused‐pyrazoles was achieved by successfully catalyzing addition and oxidative N−N bond‐making reactions by CuI and CuCl, respectively. Significantly, our novel technique could convert the prepared ketimines into the pharmacologically recognized 6 H ‐benzo[ c ]chromene frameworks." @default.
- W4313311942 created "2023-01-06" @default.
- W4313311942 creator A5001546272 @default.
- W4313311942 creator A5010260271 @default.
- W4313311942 creator A5028440893 @default.
- W4313311942 creator A5055421585 @default.
- W4313311942 date "2023-01-16" @default.
- W4313311942 modified "2023-10-14" @default.
- W4313311942 title "Swapping Copper‐Catalytic Process: Selective Access to Pyrazoles and Conjugated Ketimines from Oxime Acetates and Cyclic Sulfamidate Imines" @default.
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