Table 1.
| ||||
---|---|---|---|---|
entry | solvent | temperature | reaction time (h) | 11B NMR/GC/MS |
1 | EtOAc | rt | 48 | S.M. |
2 | CH3CN | rt | 48 | S.M. |
3 | heptane | rt | 48 | S.M. |
4 | H2O | rt | 4 | 1a: protodeboronation (1:1) |
5 | EtOAc:H2O | rt | 4 | 1a: protodeboronation (3:1) |
6 | CH3CN:H2O | rt | 4 | 1a: protodeboronation (2:1) |
7 | heptane:H2O | rt | 4 | 1a |
8 | heptane:H2O | 50 °C | 2 | 1a (89% isolated yield) |