The scandium-catalyzed reactions of alpha-organosulfanyl and organoselanyl-alpha-fluoroacetates 1-2, acetamides 3-4 and acetonitrile 5 with soft nucleophiles proceeded to give the products 6a-b, 7a-c, 8a-c, 9a-e in good to high yields. We also successfully performed the scandium-catalyzed intramolecular cyclization reactions and obtained the unique 5-methylene-2-oxotetrahydropyrans 16-17.
soft催化的α-有机
硫烷基和有机糖基-α-
氟乙酸酯1-2,乙酰胺3-4和
乙腈5与柔软的亲核试剂的反应进行,得到的产物6a-b,7a-c,8a-c,9a-e好到高产。我们还成功地进行了dium催化的分子内环化反应,并获得了独特的5-亚甲基-2-氧代
四氢吡喃16-17。