An efficient, rapid, and eco-friendly protocol for one-pot, four-component preparation ofdihydropyrano[2,3-c]pyrazole and pyrazolopyranopyrimidine derivatives has been developed usingvitamin D as an efficient catalyst. This method involves several advantages such as low
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An efficient, rapid, and eco-friendly protocol for one-pot, four-component preparation ofdihydropyrano[2,3-c]pyrazole and pyrazolopyranopyrimidine derivatives has been developed usingvitamin D as an efficient catalyst. This method involves several advantages such as low-cost andnon-toxic catalysts, high yields of products, simple workup, no hazardous solvent, and no need forcolumn chromatography.
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