These rings are stable at high temperature showing a constant rubbery modulus from T g up to 160°C. It is noted that the modulus varies with the formulation, the nature of the prepolymer and its molecular weight, the rate of diisocyanate and the catalyst as well as the possibility of ...
Nevertheless, such a condensation according to Rap [1] cannot be carried out in certain cases, particularly with acetonitrile.doi:10.1002/jhet.5570250234Jean-Pierre BuissonRené RoyerJournal of Heterocyclic 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 ...
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...
PubMed comprises more than 23 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.doi:10.1021/ac00044a017Girardet, AAnalytical Chemistry...
In order to study the influence of the nature of the moiety bearing a tetrathiafulvalenyl group in the polymers upon the microlithographic properties of resists, poly( p -chloromethylstyrene)s and poly(styrene- co-p -chloromethylstyrene)s containing the 4-tetrathiafulvalenylphenoxymethyl group ...
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 ...
doi:10.1002/hlca.660410114Jaunin, R.Lausanne, Laboratoire de Chimie organique de l'UniversitéBaer, T.Lausanne, Laboratoire de Chimie organique de l'UniversitéJohn Wiley & Sons, Ltd.Helvetica Chimica Acta
Nous décrivons la synthèse de bis (alkyl-4 phényl) et bis (alkoxy-4 phényl) tétrathiafulvalènes originaux. Certains d'entre eux présentent un polymorphisme dont on a précisé les températures de transition. We report the synthesis of di(4-alkoxyphenyl)- and di(4-alkanoyloxy-phenyl)...
Draguet, C.Service de Chimie Organique, Université de Liége, 1B, quai Roosevelt, LiégeRenson, M.Service de Chimie Organique, Université de Liége, 1B, quai Roosevelt, LiégeJohn Wiley & Sons, Ltd.Bulletin des Sociétés Chimiques Belges...