Microwave-Assisted Synthesis of Isopropyl β-(3,4-Dihydroxyphenyl)-α-hydroxypropanoate

Table 9

Variance analysis of orthogonal experiment on synthesis of isopropyl 𝛽-(3,4-dihydroxyphenyl)-𝛼-hydroxypropanoate.

Source	Sum of squares	Degree of freedom	Mean square	F value	P value
Factor A; temperature (°C)	57.2	2	28.6	0.06	0.943
Factor B; time (min)	534.7	2	267.3	0.56	0.641
Factor C; MW power (W)	133.4	2	66.7	0.14	0.877
Error	955.0	2	477.5