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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...
The synthesis of 1,3,4-trisubstituted pyrroles has been realized via the cascade reactions of phenylacetaldehydes and primary amines. It is the first time that this annulation involving the construction of one new C–C and two new C–N bonds has been successfully conducted under metal-free conditions.
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