Stereoselective synthesis of 1,2- and 1,
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Shinji Yamada; Momoe Saitoh; Tomoko Misono
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Article
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2002
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Elsevier Science
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French
β 115 KB
Selective shielding of one side of the pyridinium face by way of intramolecular cation-p complex formation enabled nucleophiles to attack the pyridinium ring from the non-shielded side. As a result, 1,2-and 1,4-dihydropyridines were formed in good stereoselectivities. 1 H NMR analysis and ab initio