Number | Date | Country | Kind |
---|---|---|---|
2414253 | Mar 1974 | DT |
Number | Name | Date | Kind |
---|---|---|---|
2406713 | Senkus | Aug 1946 | |
2700685 | Cooper et al. | Jan 1955 | |
2888492 | Fischer et al. | May 1959 | |
3383426 | Cull et al. | May 1968 | |
3404188 | Privette et al. | Oct 1968 |
Entry |
---|
Fell et al., "Tetrahedron Letters", No. 32 (1969), pp. 2721-2723. |