References
- Timms , G. H. and Wildsmith , E. 1971 . Tetrahedron Lett. , : 195
- McMurry , J. E. and Melton , J. 1971 . J. Amer. Chem. Soc. , 93 : 5309
- Johnson , C. R. , Bacon , C. C. and Rigau , J. J. 1972 . J. Org. Chem. , 37 : 919 D. W. Chasar, J. Org. Chem. 36, 613 (1971) and references cited therein