The filtration of diesel particulate matter is a major industrial and environmental stake, since the discovery of carcinogenic effects of this kind of particles and the advent of Euro IV (2005) and Euro V (2008-2010) regulations. The aim of this study is to point out the industrial ...
Il est montré que la condensation de Rap [1] d'un composé halogéno-méthylénique et d'un aldéhyde ortho - hydroxylé peut 臎tre effectuée en péri , avec les aldéhydes hydroxy-8 naphtoïques-1. Up to now, little is known about naphtho[1,8- bc ]pyran (oxaphenalene) ...
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The possibility of the formation of a carbocation-like intermediate is discounted since SN1 type glycosylation reactions of19by MeOH ort-BuOH lead preferentially to products with thecis-configuration.[Journal translation]Christian H. GagnieuAnnie V. GrouillerHenri Pachecocanadian journal of chemistry...
These condensations proceed regio and stereospecifically to afford, in good yields, three families of hydroxy aryl ethylenic sulfides. The regiochemistry is determined by the stereochemistry, the substitution of the oxiranes, and the reaction conditions. During the condensation, 1,3 phenylthio ...
Synthèse de polysiloxanes acyloxyméthylés par réaction des acides acétique, benzoïque et méthacrylique, en présence de triéthylamine, sur des polysiloxanes chlorométhylés, 1. Synthèse et identification de trisiloxanes et tétrasiloxanes modèles...
A. GirardetHelvetica Chimica Acta
Variations of these activities were checked in the transfer cells of the cotyledonary node in the intact or decapitated plant. They were also studied in the shoot apex of both inhibited (G0state) and released cotyledonary buds, during the transitions G1–S orG2–M. The adenylate cyclase ...
The reactions of [3, 2-b] pyridino [4, 5] benzo-1, 3a, 6, 6a-tetraazapentalene [I] and its nitro- or halogeno-derivatives with some electrophiles and nucleophiles are described. The directive influence of the tetraazapentalene nucleus on electrophilic and nucleophilic substitution reactions ...
As starting materials chloro-3-acetoxy-[or 3-(2,3)-epoxypropoxy]-propyldimethylsilanes ( 2 and 3 ) were prepared by hydrosilylation of the corresponding allylic derivatives with chlorodimethylsilane, and subsequently condensed with α-hydro-ω-hydroxyoligo- (or poly-) dimethylsiloxanes ( 1b ...