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Comparison of (salen)CrCl and (salen)CrN3 in the solvent-free asymmetric opening of meso epoxides.
 | |||
|---|---|---|---|
| % ee (% yield)a |
|||
| entry | Y | (salen)CrCl | (salen)CrN3 |
| 1 | CH2 | 93 (97) | 94 (99) |
| 2 | (CH2)2 | 85(96) | 88 (99) |
| 3 | O | 97 (96) | 97 (99) |
| 4 | NCOCF3 | 95 (87) | 95 (96) |
Scale: 25 - 50 mmol epoxide.
