Number | Date | Country | Kind |
---|---|---|---|
50-83870 | Jul 1975 | JA |
Number | Name | Date | Kind |
---|---|---|---|
3399201 | Schmidt et al. | Aug 1968 | |
3489799 | Schmidt et al. | Jan 1970 | |
3778467 | Wilhelm et al. | Dec 1973 | |
3821214 | Wilhelm et al. | Jun 1974 |
Entry |
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"Tetrahedron" , vol. 25 (1969), p. 3428s. |
"J. Org. Chem.", vol. 26 (1961), p. 4281. |