Haloketone dehalogenation by iodide ion

NaI in aqueous acid-THF is an efficient reagent for dehalogenation of α-haloketones.     

A few questions on the sonochemistry of solutions

Sonochemical reactions in solution have an underexploited synthetic potential. Most of the obstacles to expand this attractive domain come from unanswered questions on, for example, the importance of the radiomimetic effect, the implication of the solvent as a relay in the reaction mechanism, the existence of redox processes, and concerning cavitation, the structure of the bubble interface and the pressure effects associated to the collapse.     

Selective tin and zinc mediated allylations of carbonyl compounds in aqueous media

Aldehydes undergo preferential allylation in the presence of ketones by the tin or zinc mediated method, easily effected in aqueous media.     

Ultrasound in organic synthesis 5. Preparation and some reactions of colloidal potassium

Colloidal potassium is easily obtained by ultrasonic irradiation in toluene. Some of its reactions with organic substrates are given.     

Stereochimie de composes alleniques. Configuration relative des cyclononadiene-2,3 ols-1

The relative configuration of diastereomeric cyclonona-2,3-diene-1-ols, (1RS,aRS)², and (1RS,aSR), was determined by chemical methods, and confirmed by X-ray analysis of the phenylurethane derivative of the (1RS,aRS) isomer, 3a.     

The effect of ultrasound on photochemical reactions.

Sonochemistry and photochemistry are based on very different physical phenomena, which a priori seems to exclude any possibility to observe more than a simple superposition of their respective effects. Literature data are examined, first the few studies devoted to sonochemical and photochemical reactions in cases where a direct comparison is possible. The second part is devoted to an analysis of experiments in which both irradiations are effected simultaneously. Cases exist from which it can be concluded, at least provisionally, that sonication is able to quench long-lived excited states, because of the intense streaming which enhances strongly the probability of collisional deactivations.