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A rapid protocol for the multicomponent microwave-assisted organocatalytic domino Knoevenagel/hetero Diels–Alder reaction (DKHDA) has been developed for the synthesis of 2,3-dihydropyran[2,3-c]pyrazoles. The reported procedure could be used for the fast generation of novel substituted 2,3-dihydropyran[2,3-c]pyrazoles with potential anti-tuberculosis activity.
An efficient synthesis of 2,3-dihydropyrans from different terminal alkynes was developed. The 2,3-dihydropyrans were obtained in a few minutes through a microwave-assisted multicomponent enyne cross-metathesis/hetero-Diels–Alder reaction. Starting from C-ethynyl-ribofuranose, a new multicomponent approach to furanose–pyranose 1,3-C–C-linked disaccharides was also developed.
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