Synthesis, characterization and absolute configurations of methyl ladderanoates.
Sign Up to like & getrecommendations! Published in 2022 at "Chirality"
DOI: 10.1002/chir.23515
Abstract: Methyl esters of [5]-ladderanoic acid and [3]-ladderanoic acid were prepared by esterification of the acids isolated from biomass at a wastewater treatment plant. Optical rotations at six different wavelengths (633, 589, 546, 436, 405 and… read more here.
Keywords: absolute configurations; methyl ladderanoate; characterization absolute; optical rotations ... See more keywords
Male-Produced Sex Pheromone of Tibraca limbativentris Revisited: Absolute Configurations of Zingiberenol Stereoisomers and their Influence on Chemotaxis Behavior of Conspecific Females
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Chemical Ecology"
DOI: 10.1007/s10886-019-01125-w
Abstract: The rice stalk stink bug, Tibraca limbativentris, is an important rice pest in Brazil with a high invasive potential for Mexico and the USA. The sex pheromone of this species was previously identified as a… read more here.
Keywords: sex pheromone; absolute configurations; tibraca limbativentris; limbativentris ... See more keywords
Structures and absolute configurations of butenolide derivatives from the isopod-associated fungus Pidoplitchkoviella terricola.
Sign Up to like & getrecommendations! Published in 2021 at "Phytochemistry"
DOI: 10.1016/j.phytochem.2021.112981
Abstract: In this research, twenty aromatic and branched aliphatic polyketides, including seven previously undescribed butenolide derivatives, piterriones A-G and one known analogue, along with twelve known altenusin derivatives, were isolated from the isopod-associated fungus Pidoplitchkoviella terricola.… read more here.
Keywords: butenolide derivatives; pidoplitchkoviella terricola; absolute configurations; isopod associated ... See more keywords
Absolute Configurations of Griseorhodins A and C.
Sign Up to like & getrecommendations! Published in 2017 at "Tetrahedron letters"
DOI: 10.1016/j.tetlet.2017.11.008
Abstract: The known antibiotic and cytotoxic compounds griseorhodin A (1) and griseorhodin C (2) were produced in solid culture by Streptomyces puniceus AB10, which was isolated from the leaf-cutter ant Acromyrmex rugosus rugosus. Their absolute configurations… read more here.
Keywords: configurations griseorhodins; absolute configurations;
Absolute Configurations of Stink Bug- and Plant-Produced Sesquipiperitols via Synthesis of All Stereoisomers.
Sign Up to like & getrecommendations! Published in 2020 at "Journal of natural products"
DOI: 10.1021/acs.jnatprod.0c00517
Abstract: Sesquipiperitol is a sesquiterpene alcohol, some stereoisomers of which were found in several plant species. The biological role of these compounds in plants and their absolute configurations have not been reported. Recently, we found that… read more here.
Keywords: configurations stink; plant; produced sesquipiperitols; absolute configurations ... See more keywords
Compounds from Toddalia asiatica: Immunosuppressant Activity and Absolute Configurations.
Sign Up to like & getrecommendations! Published in 2020 at "Journal of natural products"
DOI: 10.1021/acs.jnatprod.0c00564
Abstract: In a screening of an extract library from plants used in Traditional Chinese Medicine the MeOH extract of Toddalia asiatica inhibited proliferation of human primary T cells with an IC50 of 25.8 μg/mL. Activity in… read more here.
Keywords: absolute configurations; configurations compounds; toddalia asiatica; asiatica immunosuppressant ... See more keywords
Identification and Proposed Relative and Absolute Configurations of Niphimycins C-E from the Marine-Derived Streptomyces sp. IMB7-145 by Genomic Analysis.
Sign Up to like & getrecommendations! Published in 2018 at "Journal of natural products"
DOI: 10.1021/acs.jnatprod.7b00859
Abstract: Analysis of the whole genome sequence of Streptomyces sp. IMB7-145 revealed the presence of seven type I polyketide synthase biosynthetic gene clusters, one of which was highly homologous to the biosynthetic gene cluster of azalomycin… read more here.
Keywords: imb7 145; analysis; absolute configurations; streptomyces imb7 ... See more keywords
Absolute Configurations of Naturally Occurring [5]- and [3]-Ladderanoic Acids: Isolation, Chiroptical Spectroscopy, and Crystallography.
Sign Up to like & getrecommendations! Published in 2018 at "Journal of natural products"
DOI: 10.1021/acs.jnatprod.8b00458
Abstract: We have isolated mixtures of [5]- and [3]-ladderanoic acids 1a and 2a from the biomass of an anammox bioreactor and have separated the acids and their phenacyl esters for the first time by HPLC. The… read more here.
Keywords: ladderanoic acids; configurations naturally; absolute configurations; naturally occurring ... See more keywords
Absolute Configurations and Stereochemical Inversion Mechanism of Epimeric Securinega Alkaloids from Flueggea suffruticosa.
Sign Up to like & getrecommendations! Published in 2020 at "Organic letters"
DOI: 10.1021/acs.orglett.0c01167
Abstract: Three pairs of Securinega alkaloid epimers with a piperidin-2-yl moiety (1-6) were isolated from Flueggea suffruticosa, and their structures including absolute configurations were definitely characterized. An interconvertible C-2' epimerization process within each pair of epimers… read more here.
Keywords: flueggea suffruticosa; inversion mechanism; absolute configurations; stereochemical inversion ... See more keywords
Enantioselective total synthesis of (-)-colchicine, (+)-demecolcinone and metacolchicine: determination of the absolute configurations of the latter two alkaloids.
Sign Up to like & getrecommendations! Published in 2017 at "Chemical science"
DOI: 10.1039/c7sc01341h
Abstract: Here, we describe a concise, enantioselective, and scalable synthesis of (-)-colchicine (9.2% overall yield, >99% ee). Moreover, we have also achieved the first syntheses of (+)-demecolcinone and metacolchicine, and determined their absolute configurations. The challenging… read more here.
Keywords: demecolcinone metacolchicine; synthesis colchicine; absolute configurations;
Six pairs of enantiomeric phthalide dimers from the rhizomes of Ligusticum chuanxiong and their absolute configurations and anti-inflammatory activities.
Sign Up to like & getrecommendations! Published in 2022 at "Bioorganic chemistry"
DOI: 10.2139/ssrn.4075673
Abstract: Six pairs of enantiomeric phthalide dimers (1-6) were isolated from the rhizomes of Ligusticum chuanxiong. Their structures and absolute configurations were elucidated by NMR spectroscopy, X-ray diffraction analyses, and electronic circular dichroism calculations. Compounds (+)-1… read more here.
Keywords: absolute configurations; enantiomeric phthalide; pairs enantiomeric; rhizomes ligusticum ... See more keywords