... Heterophylla (Wit.) Fed. der Gattung Campanula L Dr. Dieter Podlech, Corresponding Author Dr. Dieter Podlech Botanische Staatssammlung, München-Menzinger Str. 67Botanische Staatssammlung, München- ... 67Search for more papers by this author Dr. Dieter Podlech, Corresponding Author Dr. Dieter Podlech Botanische Staatssammlung, München-Menzinger Str. 67Botanische Staatssammlung, München- ...
Tópico(s): Yeasts and Rust Fungi Studies
1965 - Wiley | Feddes Repertorium
Joachim Podlech, Dieter Seebàch,
... Zugang zu Homopeptiden† Dr. Joachim Podlech, Dr. Joachim Podlech Laboratorium für Organische Chemie, der Eidgenössischen Technischen Hochschule, ETH-Zentrum, Universitätstrasse 16, CH-8092 Zürich (Schweiz), Telefax: Int. + 1/632-1144Search for more papers by this authorProf. Dr. Dieter Seebach, Corresponding Author Prof. Dr. Dieter Seebach Laboratorium ... by this author Dr. Joachim Podlech, Dr. Joachim Podlech Laboratorium für Organische Chemie, der Eidgenössischen Technischen Hochschule, ETH-Zentrum, Universitätstrasse 16, CH-8092 Zürich (Schweiz), Telefax: Int. + 1/632-1144Search for more papers by this authorProf. Dr. Dieter Seebach, Corresponding Author Prof. Dr. Dieter Seebach Laboratorium ...
Tópico(s): Click Chemistry and Applications
1995 - Wiley | Angewandte Chemie
Christel Guibourdenche, Joachim Podlech, Dieter Seebàch,
The diazo ketones derived from Z- and Boc-protected alanine, valine, and alanyl-alanine (1–5) were decomposed by catalytic amounts of silver benzoate/Et3N in the presence of polyfunctional nucleophiles such as 3-methyl-1,3-butanediol, 2-aminoethanol, carbohydrates (xylofuranose and sucrose) and nucleosides (thymidine, adenosine derivatives). In many cases, products of β-amino acylations are formed (6–14, 15b, 17–19, 21, 23, 24) with surprising functional group selectivities. The scope and limitations ...
Tópico(s): Asymmetric Hydrogenation and Catalysis
1996 - Wiley | Liebigs Annalen
Joachim Podlech, Dieter Seebàch,
Abstract The reactions of azetidin‐3‐ones 6 – 10 , readily available from the amino acids L ‐alanine, L ‐phenylalanine, L ‐valine, L ‐lysine, and L ‐aspartic acid, via the corresponding diazo ketones, with nucleophilic reagents such as complex hydrides, Grignard compounds, an ester enolate, and a Wittig ylide give the expected products 11 – 19 in good yields and mostly in high diastereoselectivities. New amino‐alcohol, γ‐amino‐ and γ‐amino‐β‐hydroxy‐carboxylic‐acid derivatives of known configurations are thus ...
Tópico(s): Traditional and Medicinal Uses of Annonaceae
1995 - Wiley | Helvetica Chimica Acta
Joachim Podlech, Dieter Seebàch,
Abstract The Arndt‐Eistert homologation of α‐amino acids was studied to determine the stereoselectivity in this reaction by chromatographic up‐to‐date analytical methods. While carba‐mate‐protected phenylglycine was transformed to the corresponding β‐amino acid methyl ester with a stereoselectivity of only 9:1, all other tested amino acid derivatives (Ala, Phe, Ser, Orn, tert ‐Leu and perhydro‐azepine‐2‐carboxylic acid, suitably protected) were homologated with full retention of configuration (products ...
Tópico(s): Cyclopropane Reaction Mechanisms
1995 - Wiley | Liebigs Annalen
Joachim Podlech, Dieter Seebàch,
By combination of an Arndt-Eistert reaction sequence and a peptide coupling, amino acids and peptides can be coupled with a second amino acid or a second peptide to give homopeptides, for example of type 1. This method has been employed to synthesize up to homohexapeptides.
Tópico(s): Peptidase Inhibition and Analysis
1995 - Wiley | Angewandte Chemie International Edition
Martina Altemöller, Joachim Podlech, Dieter Fenske,
Abstract Total synthesis of altenuene and isoaltenuene, toxins produced by various alternaria fungi, were achieved for the first time in ten steps, starting with quinic acid and commercially available acetal‐protected phloroglucinic acid, with the longest linear sequence consisting of seven steps. The key reactions are palladium‐catalyzed Suzuki‐type couplings between an arene boronate and iodinated cyclohexenes. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)
Tópico(s): Chemical synthesis and alkaloids
2006 - Wiley | European Journal of Organic Chemistry
Lothar Beyer, Katja Tielbörger, Hans‐P. Blume, U. Pfisterer, Kristina Pingpank, Dieter Podlech,
Abstract Soils are suggested to be an important factor influencing the vegetation pattern. In order to prove this hypothesis in an arid and sandy Negev ecosystem of longitudinal dunes and interdune corridors near Nizzana, Israel, the distribution of soil units and plant communities were compared on a very small‐distance level. The Nizzana site has a size of nearly 100 ha. 250 soil pits with 3–5 horizons were mapped and sampled within the soil geographical monitoring. Soil water capacity and cation ...
Tópico(s): Geology and Paleoclimatology Research
1998 - Wiley | Zeitschrift für Pflanzenernährung und Bodenkunde
Atefeh Pirani, Shahin Zarré, Hans Jürgen Tillich, Dieter Podlech, Vahid Niknam,
Cross sections of petioles in 35 species of Astragalus mainly belonging to sect. Rhacophorus were studied for circumscription of natural groups within the section and reliable characters in delimiting polymorphic species. The following characters were determined to be informative: number of parenchymatous cell layers in pith, diameter of median sclerenchymatous vascular bundle sheath and diameter of the cross section as whole. Astragalus amblolepis, A. andalanicus, A. floccosus, A. meyeri, A. paralipomenus, ...
Tópico(s): Plant Diversity and Evolution
2005 - Elsevier BV | Flora
Hartmut H. Hilger, Mechtild Balzer, Wolfgang Frey, Dieter Podlech,
Tópico(s): Plant Ecology and Taxonomy Studies
1985 - Springer Science+Business Media | Plant Systematics and Evolution
Fatemeh Taeb, Murat Ekici, Dieter Podlech,
Abstract A revision of the 17 annual species of Astragalus L. occurring in Turkey is presented. A determination key is provided together with complete descriptions, distribution maps, illustrations of diagnostic floral characters, notes on geography and ecology and an enumeration of all Turkish specimens located (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Tópico(s): Plant and Fungal Species Descriptions
2012 - Wiley | Feddes Repertorium
Joachim Podlech, Dieter Seebàch,
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Tópico(s): Cyclopropane Reaction Mechanisms
1995 - Wiley | ChemInform
The systematic position of Astragalus semnanensis is studied. Morphological and micromorphological features of this species are not in accordance with the old position of this species as a member of A. sect. Leucocercis. Within A. subgen. Astragalus this species is intermediate between A. sect. Acanthophace and A. sect. Megalocystis , but it shows critical differences from them. Therefore, a new section, A. sect. Semnanenses is described.
Tópico(s): Plant Diversity and Evolution
2001 - Wiley | Nordic Journal of Botany
Alexander A. Taubinger, Dieter Fenske, Joachim Podlech,
Ring opening of protected 3-aminoalkyl-substituted azetidin-2-ones with O-, N- or S-nucleophiles led to β,β′-diaminocarboxylic esters, amides and thioesters, respectively. The reaction outcome is improved by the addition of catalytic amounts of sodium azide. Utilization of a glycine derivative with unprotected amino function as nucleophile was possible. When bulkier amino acid esters were used, the intermediate acid azide underwent a Curtius rearrangement. The isocynates formed were trapped as the ...
Tópico(s): Synthesis and Catalytic Reactions
2008 - Elsevier BV | Tetrahedron
Dieter Podlech, full professor of plant systematics at the Ludwig-Maximilians-University of Munich, Germany, passed away peacefully ... in Kabul by Helmut Freitag (in 1966–1970), Dieter Podlech (in 1969–1971, 1978–1979), Siegmar-W. Breckle ( ... overflowed its traditional steel cases. In this way, Dieter Podlech benefitted the entire herbarium and linked the university ... in which he had done his doctoral research, Dieter Podlech was a powerful advocate for biological conservation. For ... whole gamut of biodiversity, including birds and insects. Dieter Podlech's legacy of herbarium specimens, especially from Afghanistan, ...
Tópico(s): Botany and Plant Ecology Studies
2022 - Wiley | Taxon
Christel Guibourdenche, Joachim Podlech, Dieter Seebàch,
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Tópico(s): Asymmetric Synthesis and Catalysis
1996 - Wiley | ChemInform
Joachim Podlech, Dieter Seebàch,
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Tópico(s): Synthesis and Catalytic Reactions
1995 - Wiley | ChemInform
M. Altemoeller, Joachim Podlech, Dieter Fenske,
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Tópico(s): Coordination Chemistry and Organometallics
2006 - Wiley | ChemInform
Joachim Podlech, Alexander A. Taubinger, Dieter Fenske,
Ring opening of protected 3-aminoalkyl-substituted azetidin-2-ones with O-, N-, or S-nucleophiles led to β,β′-diaminocarboxylic esters, amides, and thioesters, respectively. The reaction outcome is improved by addition of catalytic amounts of sodium azide. Reduction of the β-lactam amide moiety led to diamino alcohols.
Tópico(s): Chemical Synthesis and Analysis
2008 - Thieme Medical Publishers (Germany) | Synlett
Tópico(s): Bryophyte Studies and Records
1965 - Wiley | Feddes Repertorium
Shahin Zarré, Ali Asghar Maassoumi, Dieter Podlech,
Astragalus ghanbarianii Maassoumi, Podlech & Zarre and A. nervifolius Maassoumi, Podlech & Zarre, two new species of Astragalus sect. Campylanthus Bunge (Fabaceae) from Iran, are described and illustrated. Because of the considerable changes in the delimitation of this section, a new diagnostic key to its species is presented. Moreover, A. susianus Boissier subsp. sericeus Tietz is reduced to synonymy of A. chalaranthus Boissier & Haussknecht.
Tópico(s): Sesquiterpenes and Asteraceae Studies
2009 - Missouri Botanical Garden Press | Novon A Journal for Botanical Nomenclature
Dieter Podlech, Nicholas J. Turland, Xu Langran,
While preparing the account of As¬ tragalus L. (Fabaceae) for the Flora of China, Vol¬ ume 10, it was noticed that one species, A. yume¬ nensis S. B. Ho. described from Gansu Province in 1983, was invalidly named because two types (one flowering and one fruiting) were designated.The name is validated here, with the fruiting specimen designated as the holotype.
Tópico(s): Botany, Ecology, and Taxonomy Studies
2003 - Missouri Botanical Garden Press | Novon A Journal for Botanical Nomenclature
Four new species of Astragalus (Leguminosae) from China and Bhutan are described and illustrated. During the preparation of a revision of all Old World Astragalus-species, four new species could be detected. They are described here.The paper is dedicated to Prof. Dr. S. I. Ali who has contributed considerably to our knowledge of Astragalus in Pakistan and neighbouring countries.
Tópico(s): Rangeland Management and Livestock Ecology
2010 - Pakistan Botanical Society | Pakistan Journal of Botany
Alexander A. Taubinger, Dieter Fenske, Joachim Podlech,
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Tópico(s): Chemical Synthesis and Analysis
2008 - Wiley | ChemInform
Alexander A. Taubinger, Dieter Fenske, Joachim Podlech,
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Tópico(s): Chemical Synthesis and Analysis
2008 - Wiley | ChemInform
... Chemistry and Biology. Von Norbert Sewald und Hans-Dieter Jakubke. Wiley-VCH, Weinheim 2002. 562 Seiten, geb., 98,- Euro. ISBN 3-527-30405-3 Joachim Podlech, Joachim Podlech StuttgartSearch for more papers by this ...
Tópico(s): Biotin and Related Studies
2003 - Wiley | Nachrichten aus der Chemie