α β

α β-Unsaturated-γ-lactones were previously found in moths of the genus Yponomeuta and also in Sedum telephium host plant of a species of this genus during a study aimed at characterization of compounds from insects with deterrent actions on predators Here the isolation and structure elucidation of some of the lactones from S telephium is reported

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ChemInform Abstract: Tetrahydrofurans and γ‐Lactones

Read ChemInform Abstract: Tetrahydrofurans and γ‐Lactones Part 5 Optically Active δ ‐Hydroxy‐γ‐lactones from Cyclooctyne and Furan ‐ Synthesis of (‐) ‐(R R)‐ and (+)‐(S S)‐Muricatacin and Related Compounds ChemInform on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips

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Instituto de Productos Naturales y Agrobiologa

Alkane- alkene- alkyne-γ-lactones and ryanodane diterpenes from aeroponically grown Persea indica roots This work presents the study of the roots of the Macaronesian paleoendemism Persea indica (L ) Spreng The root biomass of this protected tree species has been produced by soil-less aeroponic culture under controlled environment This system has important advantages over traditional

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Synthesis of enantiomericaly pure γ

enantiomerically pure γ-lactones are valuable chiral synthetic intermediates useful for further transformations 13 Our continuing interest in the synthesis of pheromones and natural products with a lactonic structure using inexpensive commercially available carbohydrates 14 prompted us to investigate the synthesis of enantiomerically pure γ-lactones such as those depicted in Figure 1

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WO2013026737A3

The invention relates to a method for producing γ-hydroxycarboxylic esters and γ-lactones which are suitable as aromatic substances by electrochemical reductive cross-coupling of α β-unsaturated esters with carbonyl compounds in an undivided electrolytic cell said cell having a cathode that consists of lead lead alloys cadmium cadmium alloys mercury steel glassy carbon or boron

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ChemInform Abstract: Tetrahydrofurans and γ‐Lactones

Read ChemInform Abstract: Tetrahydrofurans and γ‐Lactones Part 5 Optically Active δ ‐Hydroxy‐γ‐lactones from Cyclooctyne and Furan ‐ Synthesis of (‐) ‐(R R)‐ and (+)‐(S S)‐Muricatacin and Related Compounds ChemInform on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips

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New Biotransformation Process for Production of the

γ-Lactones are industrially important flavor compounds that are widely distributed in foods fruits and beverages and are used in many fruity aromatic foods and cosmetics (1 2) γ-Dodecalactone is a flavor compound that exists in apricot peach strawberry pineapple mango plum acerola and milk γ-Dodecalactone has been used as an aroma or taste component of consumable materials

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Stereodivergent Preparation of Valuable γ

MnO 2 -promoted carboesterification of alkenes with anhydrides: a facile approach to γ-lactones Chemical Communications 2016 52 (12) 2628-2631 DOI: 10 1039/C5CC08867D Belma Hasdemir Asymmetric Synthesis of Some Chiral Aryl and Hetero Aryl-Substituted β - γ - δ -Hydroxy Esters Synthetic Communications 2015 45 (9) 1082-1088 DOI: 10 1080/00397911 2014 1003353

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Dr Johannes Richers

The γ-bromoamides formed are subsequently converted to γ-lactones under mild conditions The method described is not limited to tertiary and secondary positions but also allows functionalization of primary nonactivated sp3-hybridized positions in a one-pot sequence In addition the broad functional group tolerance renders this method suitable for the late-stage introduction of γ-lactones

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Publications

Practical Syntheses of Enantiomerically Enriched γ-Lactones and γ-Hydroxy Ketones by the Alkylation of Pseudoephedrine Amides with Epoxides and their Derivatives The Journal of Organic Chemistry 1996 61(7): 2428–2440 (49) Andrew G Myers and James L Gleason A Practical Synthesis of L-Azatyrosine The Journal of Organic Chemistry 1996 61(2): 813–815 (48) Andrew G Myers and

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Waol A trans

An organic extract of a filamentous fungus (MSX 58801) identified as a Volutella sp (Hypocreales Ascomycota) displayed moderate cytotoxic activity against NCI-H460 human large cell lung carcinoma Bioactivity-directed fractionation led to the isolation of three γ-lactones having the furo[3 4-b]pyran-5-one bicyclic ring system [waol A (1) trans-dihydrowaol A (2) and cis-dihydrowaol A (3)]

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Thiolactone — Wikipdia

En chimie organique les thiolactones constituent une classe de composs htrocycliques Ce sont les analogues des lactones dans lesquelles un atome d'oxygne est remplac par un atome de soufre L'atome de soufre se situe dans le cycle et est adjacent un groupe carbonyle La nomenclature des thiolactones est similaire celle des lactones : elles sont reprsentes par une lettre

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Sesquiterpene Lactones from Artemisia Genus: Biological

Sesquiterpene lactones are a large group of natural compounds found primarily in plants of Asteraceae family with over 5000 structures reported to date Within this family genus Artemisia is very well represented having approximately 500 species characterized by the presence of eudesmanolides and guaianolides especially highly oxygenated ones and rarely of germacranolides

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γ

γ-Lactones are well known organic compounds They can be isolated from many different plants e g from Asteraceae (Compositae) family They are used as active ingredients of various medicinal herbs and exhibit a variety of biological activities i e antiviral antibacterial anticancer anti-malarial anti-inflammatory and others Among

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ウイスキーラクトン

ウイスキーラクトン (whisky lactone) は、C 9 H 16 O 2 でされるγ-ラクトンのである。 ウイスキーなどのりのとしてられている。 IUPACは5-ブチル-4-メチルテトラヒドロフラン-2-オンまたは3-メチルオクタノ-4-ラクトンである。にクエルクスラクトン (quercus lactone)、オーク

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Transition

Various trichlorinated γ-lactones having a variety of alkyl substituents were prepared by this method γ-Lactones were generally obtained as a singleproduct except the cyclization of methallyl trichloroacetate which afforded a mixture of γ- and δ-lactones The addition of a dichloroacetyl moiety and a chlorine atom to olefins was not stereospecific Trichloroacetates of secondary allylic

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Synthesis of 7

7-hydroxy-γ-lactones The 7-hydroxy group could be oxidized to a keto group or acetylated easily The 7-hydroxy- 7-oxo- and 7-acetoxy-γ-lactones synthesized are not natural compounds and are being reported for the first time Their structures were established by Infra Red (IR) 1H and 13C Nuclear Magnetic Resonance (NMR) 2D NMR (COSY and HETCOR) spectroscopy and Gas Chromatography

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γ

γ-lactones γ-lactone lactone chiral chiral gc separation Printing tips! To print chromatograms full page change the print settings in the print dialogue window of your PDF reader software: 1) fit or fit to page 2) landscape for wide chromatograms or portrait for tall chromatograms Recommendations Rt-βDEXcst Columns

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