Table 1.
| ||
---|---|---|
entry | base | 1H NMR assay yield (%) |
1 | LiO-tBu | 0 |
2 | NaO-tBu | 0 |
3 | KO-tBu | 0 |
4 | LiN(SiMe3)2 | 53 |
5 | NaN(SiMe3)2 | 60 |
6 | KN(SiMe3)2 | 74 |
| ||
---|---|---|
entry | base | 1H NMR assay yield (%) |
1 | LiO-tBu | 0 |
2 | NaO-tBu | 0 |
3 | KO-tBu | 0 |
4 | LiN(SiMe3)2 | 53 |
5 | NaN(SiMe3)2 | 60 |
6 | KN(SiMe3)2 | 74 |