Synthetic Mono-Rhamnolipids Display Direct Antifungal Effects and Trigger an Innate Immune Response in Tomato against Botrytis Cinerea
作者:Mathilde Robineau、Sarah Le Guenic、Lisa Sanchez、Ludovic Chaveriat、Vincent Lequart、Nicolas Joly、Maryline Calonne、Cédric Jacquard、Stéphane Declerck、Patrick Martin、Stephan Dorey、Essaid Ait Barka
DOI:10.3390/molecules25143108
日期:——
work, we synthetized new synthetic mono-rhamnolipids (smRLs) consisting in a rhamnose connected to a simple acyl chain and differing by the nature of the link and the length of the lipid tail. We then investigated the effects of these ether, ester, carbamate or succinate smRL derivatives on Botrytis cinerea development, symptoms spreading on tomato leaves and immuneresponses in tomato plants. Our results
天然鼠李糖脂是潜在的生物防治剂,可用于保护植物免受细菌和真菌病害。在这项工作中,我们合成了新的合成单鼠李糖脂 (smRLs),其中包含连接到简单酰基链的鼠李糖,其不同之处在于链接的性质和脂质尾的长度。然后,我们研究了这些醚、酯、氨基甲酸酯或琥珀酸酯 smRL 衍生物对灰霉病菌发育、番茄叶片上蔓延的症状和番茄植株免疫反应的影响。我们的结果表明,合成 smRL 能够在番茄中触发早期和晚期免疫相关的植物防御反应,并在受控条件下增加植物对 B. cinerea 的抗性。
Catalyst-Controlled, Site-Selective Sulfamoylation of Carbohydrate Derivatives
作者:Daniel J. Gorelik、Julia A. Turner、Mark S. Taylor
DOI:10.1021/acs.orglett.2c01590
日期:2022.7.29
Methods for site-selective sulfamoylation of secondary hydroxyl groups in pyranosides are described. Using a boronic acid catalyst, selective installation of a Boc-protected sulfamoyl group at the equatorial position of cis-diols in manno- and galacto-configured substrates has been achieved. Activation of trans-diol groups in gluco- and galacto-configured substrates is also possible by employing an
Synthesis and biological evaluation of acylated oligorhamnoside derivatives structurally related to mezzettiaside-6 with cytotoxic activity
作者:Gaopeng Song、Sumei Li、Zhiwei Lei、Yibin Li、Junhua Li、Yixian Liao、Zi-Ning Cui
DOI:10.1039/c6ob00862c
日期:——
Two partially acylated oligorhamnoside derivatives 1 and 2 structurallyrelated to the natural product mezzettiaside-6 were synthesized via a ‘2 + 1 + 1’ convergent strategy. The bioassay results showed that the introduction of the acetyl groups to the 2-position of the terminal L-rhamnose was helpful to improve in vitro cytotoxicity. Compound 1 showed both extensive in vitro cytotoxicity in tumor
Studies on β-d-Gal -(1→4)-α-l-Rha octyl analogues as substrates for mycobacterial galactosyl transferase activity
作者:Ashish K. Pathak、Gurdyal S. Besra、Dean Crick、Joseph A. Maddry、Caroline B. Morehouse、William J. Suling、Robert C. Reynolds
DOI:10.1016/s0968-0896(99)00199-6
日期:1999.11
wall of Mycobacteriumtuberculosis (MTB) make the pathways for their biosynthesis and utilization attractive targets for the development of new and selective anti-tubercular agents. A cell-free assay system for galactosyltransferase activity using UDP[14C]Gal as the glycosyl donor, as well as an in vitro colorimetric broth micro-dilution assay system, were used to determine the activities of three