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Yield and reaction time comparison between microwave and conventional methods in the synthesis of 5-arylazo-3-cyano-2-(2″,3″,4″,6″-tetra-O-acetyl-β-d-galactopyranosyloxo)-pyridines (8a–d).
| Compound No. | R | Ar | Microwave Synthesis | Conventional Synthesis | |
|---|---|---|---|---|---|
| Reaction Time/min Yield (%) |
Reaction Time/h Yield (%) |
||||
| Method A | Method B | Method C | |||
| 8a | CH3 | 4-ClC6H4 | 2 (92) | 5 (86) | 53 (50) |
| 8b | CH3 | 3-NO2C6H4 | 3 (90) | 5 (81) | 53 (49) |
| 8c | C6H5 | 4-ClC6H4 | 2 (95) | 4 (85) | 51 (44) |
| 8d | C6H5 | 3-NO2C6H4 | 2 (93) | 4 (83) | 51 (51) |
