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. 2020 Aug 25;9(9):787. doi: 10.3390/antiox9090787

Table 2.

Structures and yield of OMe precursors prepared, amides 19 to 28 and ureas 29 to 36.

graphic file with name antioxidants-09-00787-i002.jpg

Compound R1 R2 R3 R4 R5 R2′ R3′ R4′ R5′ X Yield (%)
19 H OMe H OMe H OMe H H OMe CH2 81
20 H OMe H H OMe OMe H OMe H CH2 77
21 H H H OMe H OMe H H OMe CH2 50
22 H OMe H H OMe OMe H H OMe CH2 65
23 H OMe H OMe H OMe H OMe H CH2 74
24 H H OMe OMe H OMe H H OMe CH2 73
25 H H H OMe H H OMe OMe H CH2 81
26 H H H OMe H OMe H OMe H CH2 76
27 (4-OMe)Ph H H OMe H OMe H H OMe CH2 28
28 (2,5-OMe)Bn H H OMe H OMe H H OMe CH2 74
29 H OMe H OMe H OMe H H OMe NH 55
30 H OMe H H OMe H H OMe H NH 85
31 H OMe H H OMe H OMe OMe H NH 69
32 H H OMe OMe H H H OMe H NH 42
33 H H H OMe H H H OMe H NH 80
34 H OMe H H OMe OMe H H OMe NH 84
35 (4-OMe)Ph H H OMe H H H OMe H NH 63
36 (2,5-OMe)Bn H H OMe H OMe H H OMe NH 17