Efficient synthesis of enantiomeric pairs of thiolactomycin and its 3-demethyl derivative
摘要:
Starting with commercially available tiglic aldehyde, the title synthesis was achieved by employing deconjugative asymmetric alpha-sulfenylation of the chiral 3-(alpha,beta,gamma,delta-unsaturated acyl)-2-oxazolidinone with a methanethiosulfonate as a key step. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis and biological activity of enantiomeric pairs of 5-vinylthiolactomycin congeners
作者:Kohei Ohata、Shiro Terashima
DOI:10.1016/j.bmcl.2007.04.067
日期:2007.7
prepared, it appeared evident that in vitro antibacterial and mammalian type I FAS inhibitory activity of thiolactomycin congeners can be cleanly separated by changing not only the structure but also the absoluteconfiguration of the side chain at the C(5)-position. These studies led us to explore (S)-3-demethyl-5-(pent-1-enyl)thiolactomycin derivative [(S)-4-hydroxy-5-methyl-5-(pent-1-enyl)-5H-thiophen-2-one]
Synthesis and Biological Activity of Enantiomeric Pairs of 5-(Alk-2-enyl)thiolactomycin and 5-[(E)-Cycloalk-2-enylidenemethyl]thiolactomycin Congeners
作者:Kohei Ohata、Shiro Terashima
DOI:10.1248/cpb.57.920
日期:——
The title compounds were synthesized by the efficient route previously explored for the synthesis of enantiomeric pairs of thiolactomycin and its 3-demethyl derivative. These studies were carried out to prove the flexibility of the previously explored synthetic route to natural thiolactomycin (TLM) 1 and to examine the structure–activity relationship on the 5-position of 1. While all of the synthesized congeners lacked in vitro antibacterial activity, these studies led us to find 5-(alk-2-enyl)-TLM (ent-4d) which exhibits mammalian type I fatty acid synthase (FAS) inhibitory activity equal to that of C75, a potent inhibitor reported previously. It was also found that 5-[(E)-cycloalk-2-enylidenemethyl]-TLM (ent-5c) exhibited slightly less potent mammalian type I FAS inhibitory activity than C75.
标题化合物是通过之前探索的合成硫代霉素对映体及其 3-去甲基衍生物的高效路线合成的。虽然所有合成的同系物都缺乏体外抗菌活性,但这些研究使我们发现了 5-(alk-2-enyl)-TLM(ent-4d),它对哺乳动物 I 型脂肪酸合成酶(FAS)的抑制活性与之前报道的强效抑制剂 C75 相当。研究还发现,5-[(E)-环烷-2-亚烯基甲基]-TLM(ent-5c)对哺乳动物 I 型脂肪酸合成酶的抑制活性略低于 C75。
Synthesis and biological activity of enantiomeric pairs of 5-[(E)-cycloalk-2-enylidenemethyl]thiolactomycin congeners
作者:Kohei Ohata、Shiro Terashima
DOI:10.1016/j.bmcl.2008.08.103
日期:2008.10
The title congeners were synthesized by employing our efficient synthetic route previously explored for preparing enantiomeric pairs of thiolactomycin and its 3-demethyl derivative. While all the synthesized congeners lacked in vitro antibacterial activity, some of the congeners bearing an (E)-cyclohept-2-enylidenemethyl or an (E)-cyclooct-2-enylidenemethyl group were found to exhibit more potent type
Efficient synthesis and biological activity of enantiomeric pairs of thiolactomycin and its 3-demethyl derivative
作者:Kohei Ohata、Shiro Terashima
DOI:10.1016/j.tet.2009.01.054
日期:2009.3
The title total synthesis was achieved by employing deconjugative asymmetric α-sulfenylation of the chiral 3-(α,β,γ,δ-unsaturated acyl)oxazolidin-2-one with a 3,3-dimethoxypropyl methanethiosulfonate as a key step. From the biological activity assay carried out using the title compounds, it appeared evident that in vitro antibacterial and mammalian type I FAS inhibitory activity can be cleanly separated
Efficient synthesis of enantiomeric pairs of thiolactomycin and its 3-demethyl derivative
作者:Kohei Ohata、Shiro Terashima
DOI:10.1016/j.tetlet.2006.02.058
日期:2006.4
Starting with commercially available tiglic aldehyde, the title synthesis was achieved by employing deconjugative asymmetric alpha-sulfenylation of the chiral 3-(alpha,beta,gamma,delta-unsaturated acyl)-2-oxazolidinone with a methanethiosulfonate as a key step. (c) 2006 Elsevier Ltd. All rights reserved.