Table 2.
Phosphine-Catalyzed Asymmetric Synthesis of Benzylic Ethers: Scope with Respect to the Aryl Groupa
| |||
|---|---|---|---|
| entry | Ar | ee (%) | yield (%)b |
| 1 |
|
96 | 94 |
| 2 | 95 | 90 | |
| 3 | 96 | 84 | |
| 4c |
|
88 | 76 |
| 5c | 86 | 86 | |
| 6c,d |
|
88 | 64 |
| 7 |
|
94 | 97 |
| 8 |
|
92 | 93 |
| 9 |
|
92 | 96 |
| 10 |
|
92 | 89 |
All data are the average of two experiments.
Yield of purified, isolated product.
Catalyst loading: 10% (S)–1.
Amount of nucleophile: 2.0 equiv.