Diisobutylaluminum hydride (DIBALH) can be used to carry out which of the follow

Question

Diisobutylaluminum hydride (DIBALH) can be used to carry out which of the following conversions? ester to aldehyde carboxylic acid to ester 2degree alcohol to ketone aldehyde to carboxylic acid ester to Ketone Which of the following reagents will quantitatively convert an enolizable ketone to its enolate salt? lithium hydroxide lithium diisopropylamide propyzamide methyllithium diethylamine pyridine the Hell-Volhard-Zelinsky reaction Involves. the alpha - bromination of carboxylic acids the alpha - bromination of ketones the bromination of alcohols he oxidation of aldehydes to acids none of the above the product of the following reaction is a semicarbazone oxime hydroxylamine schiff base enamine

Explanation / Answer

(9) DIBALH is an electrophilic reducing agent, usually employed in selective reductions of esters or nitriles to aldehydes; lactones to lactols; ,-unsaturated carbonyl compounds to allylic alcohols, at low temperatures (-78oC).It reduces carbonyl or nitrile groups selectively in presence of double bonds, halide groups, ethers, nitro groups etc.,

Therefore option (A) is correct.

(10)Lithium diisopropylamide is used for the conversion of enolizable ketone to enole salt

So option (B) is correct

(11) Hell-Volhard Zelinsky reaction involves the alpha bromination of carboxylic acids

Therefore option (A) is correct

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