Table 5.
Phosphine Substituent Effects on Rearrangement.
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Entry | R | Yielda | kf+rb | kfb | Keq | ΔGexpc | |
29a | 29b | Cy | 72% | - | - | -d | - |
11a | 11b | t-Bu | 59% | 1.00 ± 0.03 | 1.00 ± 0.03 | 8.71 ± 0.15 | −1.26 ± 0.01 |
30a | 30b | Ad | 37% | 0.87 ± 0.04 | 0.87 ± 0.03 | 9.00 ± 0.16 | −1.28 ± 0.01 |
Isolated yield, prepared in the same manner as in Table 2.
Relative to 11a in THF-d8.
In kcal/mol.
Rearranged product not observed. Ad = adamantyl