Microbial reduction of coumarin, psoralen, and xanthyletin by Glomerella cingulata
作者:Shinsuke Marumoto、Mitsuo Miyazawa
DOI:10.1016/j.tet.2010.10.089
日期:2011.1
reduced acid, hydrocoumaric acid. In the biotransformation of psoralen, two reduced metabolites, 6,7-furano-hydrocoumaric acid, and 6,7-furano-o-hydrocoumaryl alcohol were isolated from the incubation of psoralen. Xanthyletin was converted to reduced products 9,9-dimethyl-6,7-pyrano-hydrocoumaric acid and 9,9-dimethyl-6,7-pyrano-o-hydrocoumaryl alcohol by G. cingulata. The structures of the new compounds
香豆球菌,补骨脂素和黄嘌呤菌素的微生物转化是用带菌格氏菌进行的。主要反应途径涉及香豆素类似物在α,β-不饱和δ-内酯环上的还原。香豆素被丁香菌(G. cingulata)代谢,得到相应的还原酸氢香豆酸。在补骨脂素,两个缩小的代谢产物,6,7-呋喃并hydrocoumaric酸,和6,7- furano-的生物转化ø -hydrocoumaryl醇从补骨脂素的孵化隔离。Xanthyletin被转化为还原产物9,9-二甲基-6,7-吡喃并hydrocoumaric酸和9,9-二甲基-6,7-吡喃并-o- hydrocoumaryl醇由G.炭疽病。使用光谱技术表征了新化合物的结构。另外,在体外测试了包括代谢物的甲酯衍生物在内的所有化合物的β-分泌酶(BACE1)抑制活性。显示6,7-呋喃-氢香豆酸甲酯具有BACE1抑制活性,IC 50值为0.84±0.06 mM。