Výsledky vyhledávání - "H.-P. Welzel"

Clove oil reduces the aminoglycoside resistance of Pseudomonas aeruginosa

Autor: H-P Welzel, Matthias F. Melzig, E-J Strätling, Markus M. Heimesaat, Stefan Bereswill, M Ludwig, S Schmidt

Publikováno v: 67th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research (GA) in cooperation with the French Society of Pharmacognosy AFERP.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9f830d9d3819e924c9b6d75f1c4e52ee
https://doi.org/10.1055/s-0039-3400017

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Reactive Groups on Polymer-Covered Electrodes. 2. Functionalized Thiophene Polymers by Electrochemical Polymerization and Their Application as Polymeric Reagents

Autor: H.-P. Welzel, G. Kossmehl, J. Schneider, W. Plieth

Publikováno v: Macromolecules. 28:5575-5580

Esterification and the consequent reduction of thiophene-3-acetic acid by lithium aluminum hydride produces 3-(2-hydroxyethyl)thiophene (2), which must be protected before anodic polymerization. Substance 2 and the protected compounds 3, 4, and 5 wer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e2a63919bdec257bb63e223af3e4ae35
https://doi.org/10.1021/ma00120a023

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2,2-Disubstituted Cyclopentane-1,3-diones. Part 5. Simple Procedures for the Preparation of Racemic (1RS,5RS)-5-Methyl-2-oxabicyclo[3.3.0]octane-3,6-dione Starting from 2,2-Disubstituted Cyclopentane-l,3-diones

Autor: S. Ballschuh, H. Schick, H.-P. Welzel, S. Schwarz

Publikováno v: Journal f�r Praktische Chemie. 333:749-757

2-Methyl-2-(prop-2-enyl)cyclopentane-1,3-dione (15) can be transformed on two different routes into the racemate (1RS,5RS)-5-methyl-2-oxabicyclo[3.3.0]octane-3,6-dione (rac-13), a key intermediate for the synthesis of 8-methylprostaglandins. Both rou

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::69627b45993bb3bc42d4dd9a7a778457
https://doi.org/10.1002/prac.19913330509

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Prostaglandine und Prostaglandinvorstufen. Oxydative Spaltung von Olefinen durch Ozonisierung und Oxydation im Lösungsmittelsystem Aceton/tert-Butanol - eine Methode zur Gewinnung von substituierten Cyclopentylessigsäuren

Autor: S. Schwarz, H. Schick, Georg Truckenbrodt, H.-P. Welzel

Publikováno v: Journal für Praktische Chemie. 324:550-556

Prostaglandins and Prostaglandin Intermediates. Oxidative Cleavage of Olefins by Ozonization and Oxidation in the Solvent System Acetone/tert. Butanol – a Method for Preparation of Substituted Cyclopentyl Acetic Acids Oxidative cleavage of olefinic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4e4a7ac7dfe700c10f8430358918f0fa
https://doi.org/10.1002/prac.19823240408

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Prostaglandine und Prostaglandinvorstufen. VIII. Synthese von (1S, 5S)-5-Methyl-2-oxa-bicyclo[3.3.0]octan-3,6-dion, einem wichtigen Zwischenprodukt für 8-Methyl-prostaglandin C2

Autor: H. Schick, S. Schwarz, H.-P. Welzel

Publikováno v: Journal für Praktische Chemie. 325:529-533

Prostaglandins and Prostaglandin Intermediates. VIII. Synthesis of (1S, 5S)-5-Methyl-2-oxa-bicyclo[3.3.0]octane-3,6-dione, an Important Intermediate for 8-Methylprostaglandin C2 The bicyclic lactone 5 is prepared by Meerwein-Ponndorf-Verley-reduction

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c4b7f9449cb9cb0756ee41e1cbcdada2
https://doi.org/10.1002/prac.19833250402

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Prostaglandins and prostaglandin intermediates. XV. Synthesis of 4-Oxo Carboxylic Acids and ?-Lactones by oxidative cleavage of homoallyl and homopropargyl ketones or alcohols

Autor: G. Truckenbrodt, Sigfrid Schwarz, Hans Schick, H.-P. Welzel

Publikováno v: Journal f�r Praktische Chemie. 327:91-95

A convenient method to convert homoallyl or homopropargyl ketones or alcohols into 4-oxo carboxylic acids or γ-lactones is the oxidative cleavage of the multiple bond with potassium permanganate in diluted sulfuric acid. This is exemplified by the p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b80fe89dd2df4e93db603c0f7c801883
https://doi.org/10.1002/prac.19853270112

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