Showing papers by "Christian V. Stevens published in 2004"
415 citations
TL;DR: Novel N,O-acyl chitosan (NOAC) derivatives were synthesized to examine their fungicidal activity against the gray mould fungus Botrytis cinerea and the rice leaf blast fungus Pyricularia oryzae and were more active against the two plant pathogens than chitOSan itself.
154 citations
TL;DR: Emulsions prepared using the inulin-based surfactant have large droplets, but this could be significantly reduced by addition of a cosurfactant in the oil phase, namely Span 20, which ensured the long-term physical stability resulting from the strong steric repulsion between the polyfructose chains.
128 citations
Book•
01 Jan 2004
TL;DR: This book discusses the Socio-Economical Aspects and Policy of Renewable Resources, as well as some of the aspects of Green Chemistry and Sustainability, which were contributed by Jeffrey Hardy and Liisa Tahvanainen.
Abstract: List of Contributors.List of Abbreviations.Foreword.Preface.Chapter 1. Green Chemistry and Sustainability (Jeffrey Hardy).Chapter 2. Socio-Economical Aspects and Policy of Renewable Resources (Liisa Tahvanainen and Christian V. Stevens).Chapter 3. Integral Valorization (Werner Praznik and Christian V. Stevens).Chapter 4. Primary Production of Raw Materials (Waldemar Rymowicz).Chapter 5. Energy from Renewable Resources (Bio-Energy) (Mehrdad Rymowicz).Chapter 6. Identification and Quantification of Renewable Crop Materials (Anton Huber and Werner Praznik).Chapter 7. Industrial Products from Carbohydrates, Wood and Fibres (Christian V. Stevens).Chapter 8. Occurrence, Functions and Biosynthesis of Non-Carbohydrate Biopolymers (Christian O. Bramer and Alexander Steinbuchel).Chapter 9. Industrial Products from Lipids and Proteins (Roland Verhe).Chapter 10. High Value Added Industries (Jan Demyttenaere and Jozef Poppe).Chapter 11. Renewable Resources: Back to the Future (Christian V. Stevens.Index.
82 citations
TL;DR: In this article, a straightforward pyrrole synthesis from diallylamines is developed by using a tandem catalyst system leading to ring-closing metathesis with the second generation Grubbs' catalyst (10%) followed by dehydrogenation in the presence of RuCl 3 ǫ×H 2 O (2%).
71 citations
TL;DR: In this article, an oil-in-water (O/W) emulsion using a hydrophobically modified inulin surfactant, INUTEC ® SP1, was evaluated using optical microscopy.
41 citations
TL;DR: Inulin, the polydisperse polyfructose, extracted from chicory, has been modified via transesterification, using fatty acid methyl esters (FAME) to develop potential tensio-active derivatives.
27 citations
TL;DR: In this article, diphenyl α-aminomethylphosphonates are prepared in good yields using a Lewis acid catalyzed Birum-Oleksyszyn reaction.
Abstract: Diphenyl α-aminomethylphosphonates are prepared in good yields using a Lewis acid catalyzed Birum-Oleksyszyn reaction. This approach enlarges the scope of this reaction, allowing the use of aldehydes and ketones and the use of acid-labile groups in the synthesis of mono-and disubstituted diphenyl 1-aminoalkylphosphonates.
10 citations
TL;DR: In this paper, a polydisperse reserve polysaccharide extracted from chicory has been modified by alkoxylation in a water-free medium using a basic catalyst, which resulted in a range of products with very specific properties such as highly increased water solubility, moderate surface activities and very high cloud points in electrolyte media.
Abstract: Inulin, a polydisperse reserve polysaccharide extracted from chicory, has been modified by alkoxylation in a water-free medium using a basic catalyst. The reaction of inulin with ethylene oxide, as well as propylene oxide, was performed in an organic solvent, N-methylpyrrolidinone, with triethylamine as basic catalyst in almost quantitative yields. The reaction resulted in a range of products with very specific properties such as highly increased water solubility, moderate surface activities and very high cloud points in electrolyte media.
10 citations
TL;DR: In this article, 2,2-Dichlorocyclobutanones reacted with various amines to give ring opening leading to 4,4-dichlorobutanamides.
Abstract: 2,2-Dichlorocyclobutanones reacted with various amines to give ring opening leading to 4,4-dichlorobutanamides. These compounds proved to be suitable substrates for the synthesis of 3-pyrrolin-2-ones, 2-pyrrolidinones, pyrrolidines and pyrroles.
TL;DR: In this article, a short and efficient synthesis was described towards 2-dodecyl-, 2-tetradecyl, 2-(5-Tetradecenyl)- and 2-( 5,8-tricadienyl)cyclobutanones, which are specific markers of gamma-irradiated foodstuffs, e.g. chicken meat and liquid whole egg.
Abstract: A short and efficient synthesis is described towards 2-dodecyl-, 2-tetradecyl, 2-(5-tetradecenyl)- and 2-(5,8-tetradecadienyl)cyclobutanones, which are specific markers of gamma-irradiated foodstuffs, e.g. chicken meat and liquid whole egg.
01 Jan 2004
Journal Article•
TL;DR: In this article, a short and easy method for the preparation of the 2-azatricyclo[3.3.0.03,6] octane skeleton is described.
Journal Article•
TL;DR: In this paper, the synthesis of 2-ethoxycarbonyl-3-phosphono-1-vinylaziridines was performed using ethyl diazoacetate (EDA) in the presence of ytterbium(III) tritlate as a catalyst.
Abstract: Several 1-phosphono-2-aza-1,3-dienes 14 and 1-aryl-1-phosphono-2-aza-1,3-dienes 15-17 were prepared by 1,4-dehydrochlorination of the corresponding diethyl [(2-chloro-1-alkylidene)amino]methylphosphonates 10-13.1-Phosphono-2-aza-1.3-dienes 14 react smoothly with diazomethane to give 2-phosphono-1-vinylaziridines 18. The synthesis of 2-ethoxycarbonyl-3-phosphono-1-vinylaziridines 19 was performed using ethyl diazoacetate (EDA) in the presence of ytterbium(III) tritlate as a catalyst. 2-Phosphono-3-(trimethylsilyl)aziridines 20 were prepared from phosphonoazadienes 14 by treatment with (trimethylsilyl)diazomethane under reflux. 1-Aryl-1-phosphono-2-aza-1,3-dienes are not susceptible to aziridination under these conditions.
TL;DR: In this article, a short and efficient synthesis was described towards 2-dodecyl-, 2-tetradecyl, 2-(5-Tetradecenyl)- and 2-( 5,8-tricadienyl)cyclobutanones, which are specific markers of gamma-irradiated foodstuffs, e.g. chicken meat and liquid whole egg.
Abstract: A short and efficient synthesis is described towards 2-dodecyl-, 2-tetradecyl, 2-(5-tetradecenyl)- and 2-(5,8-tetradecadienyl)cyclobutanones, which are specific markers of gamma-irradiated foodstuffs, e.g. chicken meat and liquid whole egg.
01 Jan 2004