Number | Name | Date | Kind |
---|---|---|---|
2640846 | Hurwitz et al. | Jun 1953 | |
3483242 | Brownstein et al. | Dec 1969 | |
4203916 | Zengel et al. | May 1980 | |
4238404 | Zengel et al. | Dec 1980 | |
4259258 | Zengel et al. | Mar 1981 | |
4282167 | Sy et al. | Aug 1981 | |
4321402 | Ryu et al. | Mar 1982 | |
4418211 | Zengel et al. | Nov 1983 | |
4486603 | Zengel et al. | Dec 1984 | |
5068408 | Raynor et al. | Nov 1991 | |
5070200 | Raynor et al. | Dec 1991 |
Entry |
---|
Lee et al, Tetrahedron Letters, No. 20, pp. 1641-1644, (1976). |
Anita O. Sy and Joseph W. Raksis, Tetrahedron Letters, vol. 21, pp. 2223-2226, (1980). |