Lewis acid-catalyzed asymmetric hetero D
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Takao Saito; Hirofumi Suda; Mikako Kawamura; Jun-ichi Nishimura; Akemi Yamaya
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Article
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1997
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Elsevier Science
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French
โ 235 KB
Me2AICI -and TiCl4-catalyzed asymmetric hetero Diels-Alder cycloaddition reactions of 2,4-diphenyl-l-thiabuta-l,3-diene with (S)-N-acryloyl-and (S)-N-crotonoyl-4-benzyl-l,3-oxazolidin-2one dienophiles are described in which not only the sense of the n-facial selectivity but also the degree dramatica