Exclusively endo-selective Lewis acid-catalyzed hetero Diels-Alder reactions of (E)-1-phenylsulfonyl-3-alken-2-ones with vinyl ethers
(E)-1-Phenylsulfonyl-3-alken-2-ones as new hetero 1,3-dienes undergo smooth hetero Diels-Alder reactions with vinyl ethers in the presence of a catalytic amount of Lewis acid such as ZnI2, Eu(fod)3, and TiCl2(i-PrO)2
(E)-2-Oxo-1-sulfonyl-3-alkenes as Reactive Hetero 1,3-Dienes. Absolutely endo-Selective Hetero Diels-Alder Reactions with Vinyl Ethers in the Presence of a Lewis Acid Catalyst
(E)-2-Oxo-1-sulfonyl-3-alkenes as new hetero 1,3-dienes undergo smooth hetero Diels-Alder reactions with vinyl ethers in the presence of Eu(fod)3 or TiCl2(i-PrO)2.The reactions are absolutely endo-selective producing 2,4-cis-3,4-dihydro-2H-pyrans in excel
Wada, Eiji,Yasuoka, Hiroshi,Kanemasa, Shuji
p. 145 - 148
(2007/10/02)
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