Dihydroxy-7,4′-dimethoxy-dihydroflavonol and (±)-3,5,7-trihydroxy-4′-methoxy-dihydroflavonol were found in many medicinal plants, here we describe a concise synthesis route by selective protection, aldol-cond...Dihydroxy-7,4′-dimethoxy-dihydroflavonol and (±)-3,5,7-trihydroxy-4′-methoxy-dihydroflavonol were found in many medicinal plants, here we describe a concise synthesis route by selective protection, aldol-condensation, 30% H2O2 epoxidation, cyclization and deprotection from 2,4,6-trihydroxyacetophone and anisaldehyde.展开更多
The Nefedipine has been synthesized by reaction of m-nitrobenzaldehyde , ethyl acetoactate and ammomiun acetate under microwave irradiation without solvent. The reaction is completed in 4 min with 82% yield.
文摘Dihydroxy-7,4′-dimethoxy-dihydroflavonol and (±)-3,5,7-trihydroxy-4′-methoxy-dihydroflavonol were found in many medicinal plants, here we describe a concise synthesis route by selective protection, aldol-condensation, 30% H2O2 epoxidation, cyclization and deprotection from 2,4,6-trihydroxyacetophone and anisaldehyde.
文摘The Nefedipine has been synthesized by reaction of m-nitrobenzaldehyde , ethyl acetoactate and ammomiun acetate under microwave irradiation without solvent. The reaction is completed in 4 min with 82% yield.