Tetrahedron Letters p. 115 - 118 (1995)
Update date:2022-08-04
Topics: NMR spectroscopy Chiral Enantioselective Asymmetric Cyclization reaction Non-racemic Chirality determination Pummerer-type cyclization O-silylated ketene acetals Induced
Kita, Yasuyuki
Shibata, Norio
Kawano, Noriyuki
Tohjo, Takashi
Fujimori, Chino
Matsumoto, Keita
The first highly asymmetric Pummerer-type cyclization of chiral, non-racemic β-amidosulfoxides leading to enantiomerically enriched β-lactams (80-85% ee) is described. S- and R-sulfoxides (S-2a-d and R-2a-c) were treated with O-methyl-O-tert-butyldimethyl
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