Structure Determination and Total Synthesis of a Novel Antibacterial Substance, AB0022A, Produced by a Cellular Slime Mold.
作者:TAKAYUKI SAWADA、MASAHIRO AONO、SEIICHI ASAKAWA、AKIRA ITO、KATSUYA AWANO
DOI:10.7164/antibiotics.53.959
日期:——
A novel antibacterial substance, AB0022A, was isolated from the cellular slime mold Dictyostelium purpureum K1001. It inhibited the growth of Gram-positive bacteria, and its MICs ranged from 0.39 to 50 μg/ml. Because AB0022A was a highly substituted aromatic compound, we could not determine its structure based on only its physico-chemical and spectral data. We therefore used a dehalogenated derivative from AB0022A and deduced that its structure was l, 9-dihydroxy-3, 7-dimethoxy-2-hexanoyl-4, 6, 8-trichlorodibenzofuran. To confirm this structure, we synthesized the compound having the deduced structure. The synthetic compound was identical to naturally occurring AB0022A.
从细胞黏菌Dictyostelium purpureum K1001中分离得到一种新型抗菌物质AB0022A,其对革兰氏阳性细菌有抑制作用,最低抑菌浓度(MIC)范围为0.39至50μg/ml。由于AB0022A是一个高度取代的芳香族化合物,仅凭其物理化学和光谱数据无法确定其结构。因此,我们利用其去卤代衍生物推导出其结构为1, 9-二羟基-3, 7-二甲氧基-2-己酰基-4, 6, 8-三氯二苯并呋喃。为验证这一结构,我们对推测的结构进行了合成。合成的化合物与天然AB0022A完全相同。