480-20-6Relevant articles and documents
Development and Optimization of an in Vitro Multienzyme Synthetic System for Production of Kaempferol from Naringenin
Zhang, Zhiping,He, Yanzhi,Huang, Yue,Ding, Li,Chen, Lei,Liu, Yaxian,Nie, Yesen,Zhang, Xinyue
, p. 8272 - 8279 (2018/07/30)
An in vitro multienzyme synthetic system was developed and optimized to efficiently produce kaempferol in a single reaction tube. Two key genes, Atf3h and Atfls1, in the biosynthetic pathway of kaempferol were cloned into a prokaryotic expression vector and overexpressed in Escherichia coli. The recombinant proteins were purified through affinity chromatography and showed activities of flavanone 3-hydroxylase and flavonol synthase, respectively, followed by development of an in vitro synthetic system for producing kaempferol. The system contains 8.2 mM α-ketoglutaric acid, 0.01 mM ferrous ion, 0.4% sodium ascorbate, 25 μg/mL of each recombinant enzyme, and 10% glycerol in 100 mM Tris-HCl (pH 7.2). When the reaction was carried out at 40 °C for 40-50 min, the yield of kaempferol was 37.55 ± 1.62 mg/L and the conversion rate from NRN to KMF was 55.89% ± 2.74%. Overall, this system provides a promising and efficient approach to produce kaempferol economically.
Heterocycles. XXII. Stereoselective Synthesis of (+)-Aromadendrin Trimethyl Ether and Its Enantiomer, and Their Reduction
Takahashi, Hiroshi,Li, Shaoshun,Harigaya, Yoshihiro,Onda, Masayuki
, p. 1877 - 1881 (2007/10/02)
Two enantiomeric chalcone epoxides 2a and 2b are synthesized under phase-transfer conditions using 1-benzylquinidinium chloride and 1-benzylquininium chloride as catalysts, respectively.Stereoselective cyclisation of 2a and 2b, followed by methylation and
