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44Yuanjing Xiao and Junliang Zhang.
Furans versus 4H-pyrans: catalyst-controlled regiodivergent tandem Michael addition–cyclization reaction of 2-(1-alkynyl)-2-alken-1-ones with 1,3-dicarbonyl compounds, Chem. Commun., 2009, 3594. Jian Shi, Min Wang, Ling He, Ke Zheng, Xiaohua Liu, Lili Lin and Xiaoming Feng.
Enantioselective Michael addition of malononitrile to chalcones catalyzed by a simple quinine–Al(OiPr)3 complex: a simple method for the synthesis of a chiral 4H-pyran derivative, Chem. Commun., 2009, 4711. High Surface Area MgO as a Highly Effective Heterogeneous Base Catalyst for Three-Component Synthesis of Tetrahydrobenzopyran and 3,4-Dihydropyrano[c]chromene Derivatives in Aqueous Media, Catalysis Letters ZnO/MgO containing ZnO nanoparticles as a highly effective heterogeneous base catalyst for the synthesis of 4H-pyrans and coumarins in [bmim]BF4, Journal of the Iranian Chemical Society Silicon- and germanium-substituted propynals as ambident electrophiles for the design of new heterocycles and polyfunctional acetylenes, Russian Chemical Bulletin Isovaleric Aldehyde in the Synthesis of 4-Isobutyl-Substituted Pyridine-2(1H)-thiones, 4H-Pyrans, and 1,3-Cyclohexadiene, Russian Journal of General Chemistry Isobutyraldehyde in the Synthesis of Isopropyl-substituted 4H-Pyrans, 1,4-Dihydropyrano[2,3-c]pyrazole, 1,4-Dihydropyridines, and Cyclobutane, Russian Journal of General Chemistry Reusable silica-bonded S-sulfonic acid catalyst for three-component synthesis of 2-amino-5-oxo-5,6,7,8-tetrahydro-4H-chromenes and 2-amino-4H-pyrans in aqueous ethanol, Research on Chemical Intermediates CaCl2 as a bifunctional reusable catalyst: diversity-oriented synthesis of 4H-pyran library under ultrasonic irradiation, Molecular Diversity A facile solvent-free one-pot three-component method for the synthesis of 2-amino-4H-pyrans and tetrahydro-4H-chromenes at ambient temperature, Monatshefte f??r Chemie - Chemical Monthly