1998 thiopyran derivatives

thiopyran derivativesR 0370

06 - 173A Novel, Chiral Lewis Acid-Induced Enantioselective Hetero Diels–Alder Reaction of a Thiabutadiene. — Lowering the equivalents inthe title reaction decreases the yield, diastereoselectivity and enatioselectivity.Other Lewis acids such as Mg(OTf)2 or Yb(OTf)3 are much less effective. —(SAITO, T.; TAKEKAWA, K.; NISHIMURA, J.; KAWAMURA, M.; J. Chem.Soc., Perkin Trans. 1 [old] (1997) 20, 2957-2959; Dep. Chem., Fac. Sci., Sci.Univ. Tokyo, Shinjuku, Tokyo 162, Japan; EN)

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