Benzene oxides ethanol solvent addition

Hydrogenation of cinnamaldehyde to 3-phenylpropionaldehyde over palladium catalyst may be accompanied by the formation of 3-phenyl-1-propanol and propyl-benzene,218 although the formation of 3-phenylpropionaldehyde usually predominates.219,220 The composition of the products are widely affected by the nature of palladium catalysts, solvents, supports, and additives.216,221 The hydrogenation over Pd-Al203 in ethanol or over Pd-kieselguhr in acetic acid gave 3-phenylpropionalde-hyde quantitatively at room temperature and atmospheric pressure. The addition of a 1 1 ratio of ferrous chloride to palladium also resulted in quantitative formation of 3-phenylpropionaldehyde in the hydrogenation over 5% Pd-C in methanol.221 This result was contrasted with those obtained with platinum oxide where iron additives led... 

Addition of ethanol solvent to benzene oxide 1 is reported to occur at an extremely slow rate (incomplete reaction after 60 days at ambient temperature). The analogous reaction of 1 with methanol solvent proceeded readily at ambient temperature in the presence of a [Rh(CO)2Cl]2 catalyst to give the methyl ether adduct... 

Taking advantage of OAGDM-induced purple benzene [37], the oxidation of stilbene to benzoic acid is enhanced by approximately a factor of 10 [35]. The rate of esterification of benzyl bromide with potassium acetate depends on the OAGDM added and on the solvent present [35]. In ethanol, the reaction proceeded homogeneously even without OAGDM nevertheless, an additional acceleration effect was observed in the presence of OAGDM. This indicates that the enhance-... 

Oxidative addition steps are an important feature in the mechanisms of reactions of Pt(alkyne)(PPh3)a complexes with protonic acids (c/. Scheme 2 in Chapter 2), of reaction of Pt(PMePha)4 with chloroalkenes to give platinum(n) acetylides, and of Pt(PPhs)4 with nitromethane, in benzene-ethanol-water solvent, which provides a safe route to the fulminato-complex Pt(CNO)a(PPh3)2. ... 

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