References
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- Doyle , M. P. 1991 . Recl. Trav. Chim. Pays-Bas. , 110 : 305 For a recent review see:
- Shiba , T. , Koda , A. , Kusumoto , S. and Kaneko , T. 1968 . Bull. Chem. Soc. Jap. , 41 : 2748
- Saijo , S. , Wada , M. , Himizu , J-I. and Ishida , A. 1980 . Chem. Pharm. Bull. , 28 : 1459
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- New compounds (9–15, 17–24) were judged to be enatiomerically pure by chiral HPLC and/or NMR studies with chiral shift reagents.
- Kubota , H. , Kubo , A. and Nunami , K. 1994 . Tetrahedron Lett. , 35 : 3107 During the preparation of this manuscript, the following publications appeared to illustrate this point, Nunami, K., Kubota, H., Kubo, A., Tetrahedron Lett. 35, 8639 (1994)
- The use of stronger bases is precluded by the ready migration of the Cbz group to the less hindered 1 N.4