Research Article
Microwave-Assisted Synthesis of Isopropyl β-(3,4-Dihydroxyphenyl)-α-hydroxypropanoate
Table 4
Orthogonal experiment on synthesis of
-acetylamino-
-(3,4-diacetoxyphenyl)acrylic acid.
| | Trial no. | Factor A
temperature (°C) | Factor B
time (min) | Factor C
MW power (W) | Yield (%) |
| | 1 | 1 | 1 | 1 | 86.3 | | 2 | 1 | 2 | 2 | 76.2 | | 3 | 1 | 3 | 3 | 87.5 | | 4 | 2 | 1 | 2 | 83.0 | | 5 | 2 | 2 | 3 | 86.8 | | 6 | 2 | 3 | 1 | 81.3 | | 7 | 3 | 1 | 3 | 85.4 | | 8 | 3 | 2 | 1 | 76.2 | | 9 | 3 | 3 | 2 | 81.1 | | 250.0 | 254.7 | 243.8 | | | 251.1 | 239.2 | 240.3 | | | 242.7 | 249.9 | 259.7 | | | U | 61484.8 | 61512.9 | 61542.2 | | | Q | 13.9 | 42.0 | 71.3 | |
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