Acetylglycine → 2-Methyl-4-(3,5-dimethyl-4-(4-methoxy-3-(6-methoxy-3-pyridylmethyl)-phenoxy)-benzal)-5-oxazolone

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2-Methoxy-5-(2-methoxy-5-(2,6-dimethyl-4-formylphenoxy)benzyl)-pyridine (10.84 g), N-acetylglycine (5.38 g), sodium acetate (3.77 g) and acetic anhydride (70 ml) were stirred at 100±5°, (oil bath temperature) for 24 hours. The solution was cooled and evaporated to leave a brown gum which was triturated with water, then with methanol to afford 2-methyl-4-(3,5-dimethyl-4-(4-methoxy-3-(6-methoxy-3-pyridylmethyl)-phenoxy)-benzal)-5-oxazolone as a yellow solid (8.27 g, 64%), m.p. 164°-165°.

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