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Use of Glucosyl 3,5-Dinitrobenzoate in Synthesis of Glucosides and Related Oligosaccharides
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作者 黄河清 李清 +1 位作者 蔡孟深 李中军 《Journal of Chinese Pharmaceutical Sciences》 CAS 2004年第4期242-244,共3页
To investigate a new glycosylation method. Methods In the presence of TMSOTfas catalyst, 1-O-(3, 5-dinitrobenzoyl)-2, 3, 4, 6-tetra-O-benzyl-α-D-glucopyranose 1 reacted with aseries of carboxylic acid, phenols, alcoh... To investigate a new glycosylation method. Methods In the presence of TMSOTfas catalyst, 1-O-(3, 5-dinitrobenzoyl)-2, 3, 4, 6-tetra-O-benzyl-α-D-glucopyranose 1 reacted with aseries of carboxylic acid, phenols, alcohols and saccharides respectively to give the correspondingglycosylation products. The compounds were determined by ~1H NMR and ^(13)C NMR spectra. ResultsThe α-glu-co-pyranosides and related oligosaccharides were prepared in high yields. Conclusion The3, 5-dinitro-benzoyl group was found to be a good leaving group at the anomeric position andO-glucopyranosides and oligosaccharides were stereoselectively synthesized in good yield. 展开更多
关键词 glucosyl 3 5-dinitrobenzoate GLYCOSYLATION STEREOSELECTIVITY
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Studies on Glycosides(Ⅺ)──A Convenient Stereoselective Synthesis of 1-O-Aryl-α-D-glucopyranosides from Glucosyl Trimethylsilyl Ether
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作者 LI Zhong-jun QIU Dong-Xu WANG Yan-feng and CAI Meng-Shen(School of Pharmaceutical Sciences,Beijing Medical University,Beijing,100083) 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1995年第4期370-372,共3页
StudiesonGlycosides(Ⅺ)──AConvenientStereoselectiveSynthesisof1-O-Aryl-a-D-glucopyranosidesfromClucosylTrimet... StudiesonGlycosides(Ⅺ)──AConvenientStereoselectiveSynthesisof1-O-Aryl-a-D-glucopyranosidesfromClucosylTrimethylsilylEtherLIZh... 展开更多
关键词 Glucosyl trimethylsilyl ether Glycosylation STEREOSELECTIVITY
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水团花属植物化学成分和药理作用研究进展 被引量:2
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作者 张一冰 崔雪靖 +1 位作者 康文艺 闫文义 《中国药学杂志》 CAS CSCD 北大核心 2014年第18期1577-1582,共6页
目的对水团花属植物的化学成分和药理作用进行系统的综述,为合理的开发利用水团花属植物资源提供科学依据和理论基础。方法查阅水团花属的研究文献,分析、归纳后进行综述。结果目前水团花属植物化学成分、药理作用方面的研究比较深入;... 目的对水团花属植物的化学成分和药理作用进行系统的综述,为合理的开发利用水团花属植物资源提供科学依据和理论基础。方法查阅水团花属的研究文献,分析、归纳后进行综述。结果目前水团花属植物化学成分、药理作用方面的研究比较深入;临床应用方面的报道较少。结论需要进一步研究水团花属植物化学物质基础和药理作用机制,充分发挥其药用价值。 展开更多
关键词 水团花属 strictosidinic ACID noreugenin 7-D1B—D—glucosyl—noreugenin 3-oxo-urs-12-ene-27 28-dioic ACID 药理作用
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Putative zeatin O-glucosyltransferase OscZOG1 regulates root and shoot development and formation of agronomic traits in rice 被引量:2
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作者 Xiao-Ling Shang Rong-Rong Xie Hua Tian,Qing-Long Wang and Fang-Qing Guo +3 位作者 Rong-Rong Xie Hua Tian Qing-Long Wang Fang-Qing Guo 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2016年第7期627-641,共15页
As a ubiquitous reaction, glucosylation controls the bioactivity of cytokinins in plant growth and development. Here we show that genetic manipulation of zeatin-O- glucosylation regulates the formation of important ag... As a ubiquitous reaction, glucosylation controls the bioactivity of cytokinins in plant growth and development. Here we show that genetic manipulation of zeatin-O- glucosylation regulates the formation of important agronomic traits in rice by manipulating the expression of OscZOG1 gene, encoding a putative zeatin O-glucosyltransferase. We found that OscZOG~ was preferentially expressed in shoot and root meristematic tissues and nascent organs. The growth of lateral roots was stimulated in the overexpression lines, but inhibited in RNA interference lines. In shoots, knockdown of OscZOG1 expression by RNA interference significantly im- proved tillering, panicle branching, grain number per panicle and seed size, which are important agronomic traits for grain yield. In contrast, constitutive expression of OscZOG1 leads to negative effects on the formation of the grain-yielding traits with a marked increase in the accumulation levels of cis-zeatin O-glucoside (cZOG) in the transgenic rice plants. In this study,our findings demonstrate the feasibility of improving the critical yield-determinant agronomic traits, including tiller number, panicle branches, total grain number per panicle and grain weight by downregulating the expression level of OscZOG1. Our results suggest that modulating the levels of cytokinin glucosylation can function as a fine-tuning switch in regulating the formation of agronomic traits in rice. 展开更多
关键词 Cis-zeatin O-glucoside (cZOG) cytokinin glucosylation grain-yield traits lateral root panicle development RICE
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Glucosylated caffeoylquinic acid derivatives from the flower buds of Lonicera japonica 被引量:24
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作者 Yang Yu Zhibo Jiang +4 位作者 Weixia Song Yongchun Yang Yuhuan Li Jiandong Jiang Jiangong Shi 《Acta Pharmaceutica Sinica B》 SCIE CAS CSCD 2015年第3期210-214,共5页
Three new glucosylated caffeoylquinic acid isomers (1-3), along with six known compounds, have been isolated from an aqueous extract of the flower buds of Lonicera japonica. Structures of the new compounds were determ... Three new glucosylated caffeoylquinic acid isomers (1-3), along with six known compounds, have been isolated from an aqueous extract of the flower buds of Lonicera japonica. Structures of the new compounds were determined by spectroscopic and chemical methods as (-)-4-O-(4-O-beta-D-glucopyranosylcaffeoyl)quinic acid (-)-3-O-(4-O-beta-D-glucopyranosylcaffeoyl)quinic acid (2), and (-)-5-O-(4-O-beta-D-glucopyranosylcaffeoyl)quinic acid (3), respectively. In the preliminary in vitro assays, two known compounds methyl caffeate and 2'-O-methyladenosine showed inhibitory activity against Coxsackie virus B3 with IC50 values of 3.70 mu mol/L and 6.41 mu mol/L and SI values of 7.8 and 12.1, respectively. (C) 2015 Chinese Pharmaceutical Association and Institute of Materia Medica, Chinese Academy of Medical Sciences. Production and hosting by Elsevier B.V. 展开更多
关键词 Flower buds Loincera japonica CAPRIFOLIACEAE Glucosylated caffeoylquinic acid Coxsackie virus B3
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Abscisic acid receptors maintain abscisic acid homeostasis by modulating UGT71C5 glycosylation activity 被引量:3
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作者 Yanlin Ma Jing Cao +5 位作者 Qiaoqiao Chen Jiahan He Zhibin Liu Jianmei Wang Xufeng Li Yi Yang 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2021年第3期543-552,共10页
Uridine diphosphate-glucosyltransferases(UGTs)maintain abscisic acid(ABA)homeostasis in Arabidopsis thaliana by converting ABA to abscisic acid-glucose ester(ABA-GE).UGT71C5 plays an important role in the generation o... Uridine diphosphate-glucosyltransferases(UGTs)maintain abscisic acid(ABA)homeostasis in Arabidopsis thaliana by converting ABA to abscisic acid-glucose ester(ABA-GE).UGT71C5 plays an important role in the generation of ABA-GE.Abscisic acid receptors are crucial upstream components of the ABA signaling pathway,but how UGTs and ABA receptors function together to modulate ABA levels is unknown.Here,we demonstrated that the ABA receptors RCAR12/13 and UGT71 C5 maintain ABA homeostasis in Arabidopsis following rehydration under drought stress.Biochemical analyses show that UGT71C5 directly interacted with RCAR8/12/13 in yeast cells,and the interactions between UGT-71C5 and RCAR12/13 were enhanced by ABA treatment.Enzyme activity analysis showed that ABA-GE contents were significantly elevated in the presence of RCAR12 or RCAR13,suggesting that these ABA receptors enhance the activity of UGT71C5.Determination of the content of ABA and ABA-GE in Arabidopsis following rehydration under drought stress revealed that ABA-GE contents were significantly higher in Arabidopsis plants overexpressing RCAR12 and RCAR13 than in nontransformed plants and plants overexpressing RCAR11 following rehydration under drought stress.These observations suggest that RCAR12 and RCAR13 enhance the activity of UGT71C5 to glycosylate excess ABA into ABA-GE following rehydration under drought stress,representing a rapid mechanism for regulating plant growth and development. 展开更多
关键词 ABA glucosyl ester ABA receptors glycosylation activity ABA homoeostasis kinetic analysis
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