References
- Basil , B. and Kenneth , R. H. Ger. Patent, 2, 627, 210 . 1976 . Chem. Abstr., 86, 139625b (1977)
- Welstead , W. J. Jr. and Moran , H. W. US Patent, 4,126, 635 . 1978 . Chem. Abstr., 90, 719244 (1979)
- Zecher , W. and Krohnke , F. 1961 . Chem. Ber. , 94 : 690 698 707
- Krohnke , F. and Zecher , W. 1962 . Angew, Chem. , 74 : 811 Angew Chem. Int., 1, 626 (1962)
- Krohnke , F. 1976 . Synthesis , 1