A mild three-component synthetic approach to versatile 2-amino-1,4-dihydropyridines from terminal alkynes, sulfonyl azides, and N-sulfonyl-1-aza-1,3-butadienes was successfully developed and relied on the in situ generation of metalated ynamide intermediates Ib to achieve a formal inverse electron-demand hetero-Diels-Alder reaction. Experimental results suggest that alkali Metal cations (Li+ and Cs+ ions) might play a critical role to achieve the cycloaddition process.
机构:
Univ Calif San Diego, Dept Chem & Biochem, 9500 Gilman Dr,Urey Hall 4120, La Jolla, CA 92093 USAUniv Calif San Diego, Dept Chem & Biochem, 9500 Gilman Dr,Urey Hall 4120, La Jolla, CA 92093 USA
Wu, Haoxing
Devaraj, Neal K.
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机构:
Univ Calif San Diego, Dept Chem & Biochem, 9500 Gilman Dr,Urey Hall 4120, La Jolla, CA 92093 USAUniv Calif San Diego, Dept Chem & Biochem, 9500 Gilman Dr,Urey Hall 4120, La Jolla, CA 92093 USA