References
- Pelletier , S. W. , Mody , N. V. and Siegler , D. S. 1978 . Heterocycles in press
- Dvornik , D. and Edwards , O. E. 1957 . Can. J. Chem. , 35 : 860
- Schneider , W. and Muller , B. 1961 . Arch. Pharm. , 294 : 361
- Pelletier , S. W. and Mody , N. V. 1977 . Tetrahedron Letters , : 1477
- Mody , N. V. and Pelletier , S. W. 1978 . Tetrahedron Letters , : 3313