聚酮化合物中的索拉酚(Soraphens)最初是由Reichenbach和Höfle在黏细菌天然产物研究中发现的。1985年,研究人员发现了一株纤维素降解菌(Sorangium celllosom),其上清液表现出较强的抗真菌活性。通过活性追踪分离,得到了索拉酚A(化合物1)。索拉酚A共有10个手性中心,在C7位的羟基进攻C3位的羰基后形成了四氢吡喃环,并且半缩醛结构与羟基酮异构体2在水中溶解时处于平衡状态。这两种异构体会容易地转化为烯醇形式,生成化合物3。
化合物1、2和3虽然可以分别分离出来,但在水溶液中会互相转化,如下图所示:
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (E)-(1R,5S,10S,11R,14S,15S,16S,17S,18R)-1,17-Dihydroxy-10,11,18-trimethoxy-14,16-dimethyl-5-phenyl-4,19-dioxa-bicyclo[13.3.1]nonadec-12-en-3-one | 162189-64-2 | C28H42O8 | 506.637 |
—— | [(2R,3R,4S,5S,6S)-2,4-Dihydroxy-6-((E)-(1S,4R,5S,10S)-10-hydroxy-4,5-dimethoxy-1-methyl-10-phenyl-dec-2-enyl)-3-methoxy-5-methyl-tetrahydro-pyran-2-yl]-acetic acid ethyl ester | 162189-56-2 | C30H48O9 | 552.706 |
—— | (4S,5R,6S)-4-[(S)-3-(tert-Butyl-dimethyl-silanyl)-1-methoxy-prop-2-ynyl]-6-[(E)-(1S,4R,5S,10S)-10-(tert-butyl-dimethyl-silanyloxy)-4,5-dimethoxy-1-methyl-10-phenyl-dec-2-enyl]-2,2,5-trimethyl-[1,3]dioxane | 162189-53-9 | C42H74O6Si2 | 731.217 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (1R,2S,5S,10S,11R,12E,14S,15R,16S,18R)-1-hydroxy-10,11,18-trimethoxy-2,14,16-trimethyl-5-phenyl-4,19-dioxabicyclo[13.3.1]nonadec-12-en-3-one | 186768-50-3 | C29H44O7 | 504.664 |
—— | 5-O-(4-methoxybenzyl)soraphen | 164735-19-7 | C37H52O9 | 640.814 |
—— | (1R,2S,5S,10S,11R,12E,14S,15R,16S,18R)-18-hydroxy-10,11-dimethoxy-2,14,16-trimethyl-5-phenyl-4,19-dioxabicyclo[13.3.1]nonadec-12-en-3-one | 186768-52-5 | C28H42O6 | 474.638 |
—— | (3R,3aR,5R,6S,7aS)-3a,7a-dimethoxy-3,6-dimethyl-5-[(E,2S,5R,6S,11R)-5,6,11-trimethoxy-11-phenylundec-3-en-2-yl]-3,5,6,7-tetrahydrofuro[3,2-b]pyran-2-one | 498579-74-1 | C31H48O8 | 548.717 |
—— | (1R,2S,5S,10S,11R,12E,14S,15R,16S)-10,11-dimethoxy-2,14,16-trimethyl-5-phenyl-4,19-dioxabicyclo[13.3.1]nonadec-12-ene-3,18-dione | 186768-51-4 | C28H40O6 | 472.622 |
—— | 1,5,17-tris(tert-butyldimethylsilyloxy)-1,17-secosoraphen | 498579-67-2 | C47H90O8Si3 | 867.483 |
—— | (3R,3aR,5R,6S,7aS)-5-[(2S)-1-hydroxypropan-2-yl]-3a,7a-dimethoxy-3,6-dimethyl-3,5,6,7-tetrahydrofuro[3,2-b]pyran-2-one | 498579-76-3 | C14H24O6 | 288.341 |