反应详情

In a similar manner to Example 4.1, 7-acetoxy-3-(3,4-dimethoxyphenyl)chromen-4-one (1.4 g) and 5% Pd—C (0.24 g) were suspended in absolute ethanol (200 mL) and hydrogen was introduced to the system for 55 h until the reaction was complete. Filtration and evaporation gave a cis- and trans-mixture of 7-acetoxy-3-(3,4-dimethoxyphenyl)chroman-4-ol (1.4 g, 100%). This mixture was used in the next step without any further purification.

1. filtrationFiltration and evaporation