Search Results - "Steglich, Wolfgang"

The DMAP-Catalyzed Acetylation of Alcohols-A Mechanistic Study (DMAP=4-(Dimethylamino)pyridine) by Xu, Shangjie, Held, Ingmar, Kempf, Bernhard, Mayr, Herbert, Steglich, Wolfgang, Zipse, Hendrik

“…The acetylation of tert‐butanol with acetic anhydride catalyzed by 4‐(dimethylamino)pyridine (DMAP) has been studied at the Becke3 LYP/6‐311+G(d,p)//Becke3…”
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Strobilurins: Evolution of a New Class of Active Substances by Sauter, Hubert, Steglich, Wolfgang, Anke, Timm

“…A fungus that grows on pinecones yields a compound with antifungal activity that has become the natural model for a significant innovation in crop protection…”
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Enhancing the Catalytic Activity of 4-(Dialkylamino)pyridines by Conformational Fixation by Heinrich, Markus R., Klisa, Heike Sabine, Mayr, Herbert, Steglich, Wolfgang, Zipse, Hendrik

“…Six times more active than DMAP (1), the tricyclic DMAP analogue 2 catalyzes the acetylation of a tertiary alcohol with acetic anhydride. The experimental…”
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New Pulvinic Acid and Phenylalaninol Derivatives from the Mushrooms Retiboletus griseus and R. nigerrimus by Gruber, Gertraud, Kerschensteiner, Lydia, Marumoto, Ryuji, Steglich, Wolfgang

“…The close genetic relationship of the mushrooms Retiboletus griseus and R. nigerrimus is supported by the occurrence of the orange-yellow retiboletic acid,…”
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Chromogenic Meroterpenoids from the Mushrooms Russula ochroleuca and R. viscida by Sontag, Bernd, Rüth, Matthias, Spiteller, Peter, Arnold, Norbert, Steglich, Wolfgang, Reichert, Matthias, Bringmann, Gerhard

“…The spirodioxolactone ochroleucin A1 (1) is responsible for the red colour produced when the stalk base of Russula ochroleuca and R. viscida is treated with…”
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Studies on the Structure and Biosynthesis of Tridentoquinone and Related Meroterpenoids from the Mushroom Suillus tridentinus (Boletales) by Lang, Martin, Mühlbauer, Andrea, Gräf, Claudia, Beyer, Jürgen, Lang-Fugmann, Susanne, Polborn, Kurt, Steglich, Wolfgang

“…Tridentoquinone (1), the main pigment of Suillus tridentinus, is accompanied by the known meroterpenoid bolegrevilol (3) and a dimer, tridentorubin (5). The…”
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New Tryptophan Metabolites from Cultures of the Lipophilic Yeast Malassezia furfur by Irlinger, Bernhard, Bartsch, Andrea, Krämer, Hans-Joachim, Mayser, Peter, Steglich, Wolfgang

“…Eleven new indole alkaloids were isolated from cultures of the human pathogenic yeast Malassezia furfur after addition of L‐tryptophan as the sole N‐source:…”
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Malassezin, a Novel Agonist of the Aryl Hydrocarbon Receptor from the Yeast Malassezia furfur, Induces Apoptosis in Primary Human Melanocytes by Krämer, Hans-Joachim, Podobinska, Monika, Bartsch, Andrea, Battmann, Achim, Thoma, Wiebke, Bernd, August, Kummer, Wolfgang, Irlinger, Bernhard, Steglich, Wolfgang, Mayser, Peter

“…Pityriasis versicolor is the most common skin mycosis in humans worldwide. Yeasts of the genus Malassezia, particularly M. furfur, a saprophyte occurring…”
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Total Syntheses of the Marine Pyrrole Alkaloids Polycitone A and B by Kreipl, Andreas T, Reid, Caroline, Steglich, Wolfgang

“…Polycitone B (2) was obtained in four steps from pyrrole dicarboxylic acid 3, including Friedel−Crafts reaction of the corresponding acid chloride with…”
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Total synthesis of the marine alkaloid halitulin by Heinrich, Markus R, Steglich, Wolfgang, Banwell, Martin G, Kashman, Yoel

“…The structure of the strongly cytotoxic marine alkaloid halitulin ( 1 ) has been confirmed by total synthesis and its absolute configuration determined as (15…”
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Unusual Pulvinic Acid Dimers from the Common Fungi Scleroderma citrinum (Common Earthball) and Chalciporus piperatus (Peppery Bolete) by Winner, Monika, Giménez, Alberto, Schmidt, Helga, Sontag, Bernd, Steffan, Bert, Steglich, Wolfgang

“…What do some fungi have in common with chemists? Common earthballs (see picture) and peppery boletes are true artists in natural product synthesis. In few…”
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First total synthesis of the marine alkaloids purpurone and ningalin C by Peschko, Christian, Steglich, Wolfgang

“…Purpurone is obtained from 3-(3,4-dimethoxyphenyl)pyruvic acid, 2-(4-methoxyphenyl)ethylamine and 2′,2′,2′-trichloroethyl…”
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Retipolides - Unusual Spiromacrolactones from the Mushrooms Retiboletus retipes and R. ornatipes by Justus, Karl, Herrmann, Rupert, Klamann, Jörg-Dieter, Gruber, Gertraud, Hellwig, Veronika, Ingerl, Andrea, Polborn, Kurt, Steffan, Bert, Steglich, Wolfgang

“…Mushrooms of the genus Retiboletus contain the retipolides A–D (1, 6–8), unusual 14‐membered spiromacrolides with a biphenyl ether linkage. The structures of…”
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Pityriacitrin: an ultraviolet-absorbing indole alkaloid from the yeast Malassezia furfur by MAYSER, Peter, SCHÄFER, Ute, KRÄMER, Hans-Joachim, IRLINGER, Bernhard, STEGLICH, Wolfgang

“…As the main nitrogen source in Malassezia furfur, tryptophan induces the formation of fluorochromes and pigments, which make the yeast less sensitive to UV…”
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Biosynthesis and Stereochemistry of Phlegmacin-Type Fungal Pigments by Müller, Michael, Lamottke, Kai, Steglich, Wolfgang, Busemann, Stefan, Reichert, Matthias, Bringmann, Gerhard, Spiteller, Peter

“…The absolute stereostructures of phlegmacins A1 (3a) and B1 (3b) were determined by biosynthetic studies, quantum chemical CD calculations, and NOE…”
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Malassezin—a novel agonist of the Arylhydrocarbon receptor from the yeast Malassezia furfur by Wille, Gregor, Mayser, Peter, Thoma, Wiebke, Monsees, Thomas, Baumgart, Annette, Schmitz, Hans-Joachim, Schrenk, Dieter, Polborn, Kurt, Steglich, Wolfgang

“…The yeast Malassezia furfur converts tryptophan into several indole compounds. One of these, malassezin, was identified as…”
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Alkaloids from marine organisms. Part 8: Isolation of bisdemethylaaptamine and bisdemethylaaptamine-9- O-sulfate from an Indonesian Aaptos sp. marine sponge by Herlt, Anthony, Mander, Lewis, Rombang, Wilson, Rumampuk, Rymond, Soemitro, Soetijoso, Steglich, Wolfgang, Tarigan, Ponis, von Nussbaum, Franz

“…Bisdemethylaaptamine ( 6 ), a proposed biosynthetic precursor of the aaptamines has been isolated from an Aaptos sp. marine sponge harvested off the Indonesian…”
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Enzymatic Formation of Rufoschweinitzin, a Binaphthalene from the Basidiomycete Cortinarius rufoolivaceus by Thiele, Wiebke, Froede, Rita, Steglich, Wolfgang, Müller, Michael

“…Dimeric polyketides are widespread fungal secondary metabolites. They occur in both ascomycetes and basidiomycetes and, therefore, across fungal phyla. Here we…”
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Synthesis and cyclisation of didemnimide C and its imidazol-1-yl isomer by Terpin, Andreas, Winklhofer, Christian, Schumann, Susanne, Steglich, Wolfgang

“…A key step in the synthesis of the marine alkaloid didemnimide C ( 1c) is the Stille coupling between the urethane protected…”
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A concise synthesis of storniamide A nonamethyl ether [1] by Ebel, Heiner, Terpin, Andreas, Steglich, Wolfgang

“…(E,E)-Storniamide A nonamethyl ether is obtained from 3-(3,4,5-trimethoxyphenyl)-pyruvic acid and 2-(4-hydroxyphenyl)ethylamine in three steps with an overall…”
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