Table 4.
| ||||||
---|---|---|---|---|---|---|
Entry | Ketone | Cat | Yield (%) | ee (%) | ||
1 | 4b | (S)-3 (R)-7f |
90 92 |
5b | 78 (R) 86 (S) |
|
2 3 |
8a = H
8b = OTs |
(S)-3 (R)-7f (S)-3 |
59 89 70 |
9a
9b |
88 (R) 86 (S) 83 (R) |
|
4 | 8c | (S)-3 (R)-7f |
69 61 |
9c | 87 (R) 86 (S) |
|
5 6 |
4a R = OMe
8d = H |
(S)-3 (R)-7f (S)-3 |
71 97 84 |
5a
9d |
93(R) 94(S) 89 (R) |
|
7 | 8e | (S)-3 (R)-7f |
70 82 |
9e | 75 (R) 88 (S) |
|
8 | 8f | (S)-3 (R)-7f |
83 96 |
9f | 78 (R) 81 (S) |
|
9 | 8g | (S)-3 (R)-7f |
51 64 |
9g | 93 (R) 82 (S) |
|
10 | 8h | (R)-7f | 80 | 9h | 84 (S) | |
11 | 8i | (S)-3 | 94 | 9i | 15 (R) | |
12 | 8j | (R)-7f | 67 | 9j | 6 (S) |