ChemInform Abstract: Yb(OTf)₃‐Catalyzed 1,3‐Dipolar Cycloaddition of Nitrone with Alkene; Switch in Diastereoselectivity by Solvent and Bidentate Auxiliary.

Abstract

Yb(OTf ) 3 -Catalyzed 1,3-Dipolar Cycloaddition of Nitrone with Alkene; Switch in Diastereoselectivity by Solvent and Bidentate Auxiliary.-The ytterbium triflate catalyzed 1,3-dipolar cycloaddition of diphenylnitrone (I) with the crotylamides (II) is investigated. The diastereoselectivity is found to depend on the nature of the amide auxiliary and the solvent. -(MINAKATA, S.; EZOE, T.; NAKAMURA, K.; RYU, I.; KOMATSU, M.; Tetrahedron Lett. 39 (1998) 29, 5205-5208; Dep. Appl. Chem., Fac. Eng.,