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3-R-1,4,2-dioxazol-5-ones are a class of compounds that are increasingly finding diverse uses, including as regioselective amidation reagents and as electrolyte additives that enable long cycling lifetimes in rechargeable lithium-ion batteries. Conventional methods for their synthesis tend to be slow and time-consuming, requiring isolation and thorough drying of a hydroxamic acid intermediate, followed by a separate cyclization step with N,N'-carbonyldiimidazole. Furthermore, the cyclization is typically performed in dichloromethane, an environmentally harmful solvent. This work demonstrates a new one-pot method for the synthesis of these compounds that eliminates the need for isolation of the intermediate or the use of halogenated solvents. The reaction is mainly performed using environmentally benign ethyl acetate and a relatively small amount of N,N-dimethylformamide. The reaction proceeds readily at room temperature and requires no expensive metal catalysts to function. Key words: dioxazolone, amidation, lithium-ion, electrolyte additive. Les 3-R-1,4,2-dioxazol-5-ones constituent une classe de composes de plus en plus utilises dans diverses applications, notamment comme reactifs d'amidation regioselective et comme additifs electrolytiques permettant d'augmenter le nombre de cycles de charge et de prolonger la duree de vie des batteries rechargeables au lithium-ion. Les methodes classiques de synthese de ces composes sont souvent lentes et chronophages. Elles requierent des etapes d'isolation et de sechage complet d'un acide hydroxamique intermediaire, suivies d'une etape de cyclisation a l'aide du N,N'-carbonyldiimidazole. De plus, la cyclisation est habituellement effectuee dans le dichloromethane, un solvant nocif pour l'environnement. Dans ces travaux, nous presentons une nouvelle methode de synthese monotope de ces composes qui permet d'eliminer a la fois la necessite d'isoler l'intermediaire et l'emploi de solvants halogenes. La reaction requiert l'emploi de matieres peu nocives pour l'environnement, principalement de l'acetate d'ethyle et une quantite relativement faible de N,N-dimethylformamide. Elle s'effectue rapidement a temperature ambiante et ne necessite aucun catalyseur metallique couteux pour fonctionner. [Traduit par la Redaction] Mots-cles : dioxazolone, amidation, lithium-ion, additif electrolytique., Introduction In recent years, 3-R-1,4,2-dioxazol-5-one compounds are increasingly finding use as versatile reagents, especially for regioselective C-H amidation ortho to a directing group on aromatic moieties. (1) These reagents act [...]

Investigated the effects of aggressor's and victim's sex on judgments regarding sexual aggression on dates. College students read vignettes describing dating aggression, rating degree of disapproval of aggressors' behaviors from their own, the aggressor's, and the victim's viewpoint. The effect of participant viewpoint in rating aggressor behavior was strong. Students disapproved of sexual aggressors in all types of couples. (SM)

More Than Two Franklin Veaux and Eve Rickert Thorntree Press [ILLUSTRATION OMITTED] Over the past few years I have reviewed several new books on Polyamory. Each one had something to [...]

The Jealousy Workbook: Exercises and Insights for Managing Open Relationships Kathy Labriola 2013, Greenery Press, 200 pages This useful paperback has just arrived as part of the expanding literature on [...]

an intimate life sex, love, and my journey as a surrogate partner Cheryl T. Cohen Greeene with Lorna Garano Soft Scull Press 2012 233 pages of text plus bibliography $11.51 [...]

GUIDE TO GETTING IT ON, 7th ed. Paul Joannides Goofy Foot Press 2013 1184 pages including glossary and index. This is a birth announcement of the latest edition of the [...]