Table 1.
One-pot synthesis of 2-B(pin) allylic alcohols via 1-alkenyl-1,1-heterobimetallic intermediates
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|---|---|---|---|---|
| entry | R | R′ | allylic alcohol | yield (%)a |
| 1 | n-Bu | Ph | 1a | 70 |
| 2 | i-Bu | Ph | 1b | 76 |
| 3 | Bn | Ph | 1c | 68 |
| 4 | Cy | Ph | 1d | 69 |
| 5 | i-Pr | Ph | 1e | 81 |
| 6 | Ph(Me)CH2- | Ph | 1f | 62a |
| 7 | i-Pr | 4-C6H4-OMe | 1g | 88 |
| 8 | i-Pr | 4-C6H4-Cl | 1h | 81 |
| 9 | Cy | n-Bu | 1i | 85 |
| 10 | i-Pr | n-Bu | 1j | 77 |
| 11 | PhCH3(CH)- | n-Bu | 1k | 61b |
| 12 | Bn | Cyclohexenyl | 1l | 79 |
Isolated yield.
dr = 7:1 (determined by 1H NMR of crude reaction mixture), diastereomers separated by column chromatography and the major used in subsequent reactions.
