Chiral 2, 6-bis (oxazolinyl) pyridine-rare earth metal complexes as catalysts for highly enantioselective 1, 3-dipolar cycloaddition reactions of 2-benzopyrylium-4-olates

…, K Inoue, S Inoue, A Kakehi, M Shiro

Index: McMorris, Trevor C.; Yu, Jian; Herman, David M.; Kelner, Michael J.; Dawe, Robin; Minamida, Akira Journal of Labelled Compounds and Radiopharmaceuticals, 1998 , vol. 41, # 4 p. 279 - 285

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Citation Number: 61

Abstract

... J. Org. ... entry, Pybox, M(OTf) 3, conditions b, MS 4A, yield (%), endo:exo, endo ( ) d, exo ( ) d. ... a The reaction was carried out at −10 °C by adding a solution of diazo compound 1 in CH 2 Cl 2 over a period of 1 h to a suspension of either the Sc or Yb catalyst (10 mol %), MS 4A, Rh 2 ...