Table 1.
| |
---|---|
entry | product yield(%)b/conversion(%)c |
1d |
2a, 93(93)h/100 |
2e |
2b, 85/90 |
3d |
2c,13b/27 |
4d |
2d, 38b/38 |
5d |
2e, 23b/25 |
6d |
2f, 90/100 |
7d |
2g, 88/100 |
8d |
2h, 93/100 |
9f |
2i, 72/75 89/98g |
10d |
2j, 87/100 |
11e |
2k, 60/80 |
12e |
2l, 76/100 |
Reaction conditions: 1.0 equiv of aryl sulfamate, 1.05 equiv of trifluoroborate, 4 mol % XPhos-Pd-G2, K2CO3, t-BuOH/H2O (1:1, 0.5 M), 85 °C, 3 h.
isolated yield.
calculated by 1H NMR with 30 μL of CH2Cl2.
3 equiv K2CO3.
5 equiv K2CO3.
7 equiv K2CO3.
n-PrOH/H2O.
3 mmol of sulfamate, 2 mol % XPhos-Pd-G2, 3 equiv K2CO3, t-BuOH/H2O (1:1, 0.5 M), 85 °C, 18 h.