References
- Carlson , R. M. and Oyler , A. R. 1976 . J. Org. Chem. , 41 : 4065
- Yu , L.-C. and Helquist , P. M. 1981 . J. Org. Chem. , 46 : 4536 For a review see
- Minami , T. , Niki , I. and Agawa , T. 1974 . J. Org. Chem. , 39 : 3236 Excellent technical assistance on this project was provided by Mr. P. Petracek, Mr. R. J. Liukkonen, and Mr. J. Bastian