Table 2.
| ||||
---|---|---|---|---|
Entry | Acid | Amine | Time | Yield |
1 | 2 h | 75%[21] | ||
2 | 2 h | 72%[25] | ||
3 | 1 h | 65% | ||
4 | 11 h 3 h |
57%[20] 71%[b] |
||
5 | 6 h | 53%[41] | ||
6 | 50 min 1 h |
53%[42] 78%[b] |
||
7 | 1 h | 76%[32,c] | ||
8 | 1 h | 79%[39h,c] |
Reactions were conducted using 1 mmol each of Pol–PPh3 (2.28 mmol/g loading), I2 carboxylic acid, amine, and 1.5 mmol of iPr2NEt in 4 mL of CH2Cl2, unless specified otherwise.
Yield obtained by using 2 molar equiv each of Pol–PPh3 and I2.
2.5 Molar equiv of iPr2NEt was used.