Table 2.
Entry | X | Temperature (°C) | pH | Reaction Time (h) | Yield (%)a |
---|---|---|---|---|---|
1 | L | 70 | 4.5 | 48 | 67.8 |
2 | K | 70 | 4.5 | 48 | 67.5 |
3 | F | 70 | 4.5 | 48 | 65.8 |
4 | G | 37 | 5.6 | 72 | 60.5 |
5 | D-A | 70 | 5.6 | 24 | 57.1 |
6 | Q | 50 | 4.5 | 72 | 48.8 |
7 | A | 70 | 5.6 | 24 | 45.2 |
8 | T | 70 | 4.5 | 48 | 43.1 |
9 | S | 50 | 4.5 | 48 | 42.8 |
10 | R | 70 | 5.6 | 72 | 41.1 |
11 | D-C | 50 | 4.5 | 48 | 38.3 |
12 | D | 50 | 5.6 | 8 | 32.5 |
13 | C | 50 | 4.5 | 48 | 32.5 |
14 | V | 70 | 5.6 | 72 | 26.3 |
Based on RP-HPLC peak integration at 280 nm.