5,7-Dihydroxyflavanone was synthesized by hydrogenation of 5,7-dihydroxyflavone with hydrogen,catalyzed by Pd-C.The reaction conditions were optimized using the method of uniform experiment design to get 84%yield.
Five new 6-O-prolinated monoacetylbritannilactones have been synthesized from N-acetylprolyl chlorides with 4-N,N-dimethylaminopyridine as catalyst and characterized by elemental analysis, IR, 1H NMR, 1H-1H COSY and M...Five new 6-O-prolinated monoacetylbritannilactones have been synthesized from N-acetylprolyl chlorides with 4-N,N-dimethylaminopyridine as catalyst and characterized by elemental analysis, IR, 1H NMR, 1H-1H COSY and MS. The compound 3b displayed a good biological activity for human HL-60 cell in vitro(ED50=4.6 mg/L).展开更多
Title compound has been prepared at room temperature from N-phenylsu-lfonylprolylchloride with n(KCN)/n(CuCN)=1∶1 as catalyst and identified by elemental analysis, IR and MS spectra. The influence of the catalyst con...Title compound has been prepared at room temperature from N-phenylsu-lfonylprolylchloride with n(KCN)/n(CuCN)=1∶1 as catalyst and identified by elemental analysis, IR and MS spectra. The influence of the catalyst constitution on the product distribution has been discussed briefly.展开更多
文摘5,7-Dihydroxyflavanone was synthesized by hydrogenation of 5,7-dihydroxyflavone with hydrogen,catalyzed by Pd-C.The reaction conditions were optimized using the method of uniform experiment design to get 84%yield.
文摘Five new 6-O-prolinated monoacetylbritannilactones have been synthesized from N-acetylprolyl chlorides with 4-N,N-dimethylaminopyridine as catalyst and characterized by elemental analysis, IR, 1H NMR, 1H-1H COSY and MS. The compound 3b displayed a good biological activity for human HL-60 cell in vitro(ED50=4.6 mg/L).
文摘Title compound has been prepared at room temperature from N-phenylsu-lfonylprolylchloride with n(KCN)/n(CuCN)=1∶1 as catalyst and identified by elemental analysis, IR and MS spectra. The influence of the catalyst constitution on the product distribution has been discussed briefly.