Microbial Reactions on 7<i>α</i>-Hydroxyfrullanolide and Evaluation of Biotransformed Products for Antibacterial Activity
作者:Athar Ata、Jordan Betteridge、Emmanuel Schaub、Daniel J. Kozera、Paul Holloway、Radhika Samerasekera
DOI:10.1002/cbdv.200800262
日期:2009.9
(9). Microbial reactions on 1 using whole-cell cultures of Cunninghamella echinulata and Curvularia lunata yielded compounds 2-4. Incubation of compound 1 with the liquid cultures of Apsergillus niger and Rhizopus circinans yielded metabolites 5-7, while 8 and 9 were prepared by carrying out an epoxidation reaction on 1 using meta-chloroperbenzoic acid (mCPBA). Structures of compounds 2-9 were elucidated
使用抗菌活性导向的分馏方法从印度菊苣中分离出一种已知的倍半萜7alpha-羟基果糖醇(1)。该化合物对革兰氏阳性细菌表现出显着的抗菌活性。进行化学和微生物反应以制备化合物1的八个不同类似物,以评估这些新合成的化合物的抗菌活性。这些化合物是1beta,7alpha-dihydroxyfrullanolide(2),7alpha-hydroxy-1-oxofrullullide(3),4,5-dihydro-7alpha-hydroxyfrullanolide(4),11,13-dihydro-7alpha-hydroxyfrullanolide(5),13 -乙酰基7α-羟基富勒烯醇化物(6),2α,7α-二羟基星杂醇化物(7),4α,5α-环氧-7α-羟基富勒烯醇化物(8)和4β,5β-环氧-7α-羟基富勒烯醇化物(9)。使用chinninghamella echinulata和Curvularia