Question

Another Nuclelophilie Addition Reaction: Addition of Alcohols to make Hemiacetals and Acetals You will need to predict products of these reactions. But you do not need to be able to draw out the mechanisms.) OH R-OH c-OR OK -&-OR | RoH H' catalyst H' catalyst Ketone/Aldehyde Hemiacetal Acetal Show the following reaction: Cyelohexananone + Methanol (excess). Show the starting material, the hemiacetal intermediate and the acetal product. + CH₂OH Hemiacetal Do problem 19.15. pg. 720 Draw the acetal product for the following reochon: Acetal CHO CH₂O GH + HOCH Show the product you would obtain by the acid.catalyzed reaction of 2-pentanone with propane-1,3-diol. This reaction can be used to protect" a ketone or an aldehyde in reactions since the acetal is unreactive to bases, hydride reducing agents, Grignard reagents and catalytic reducing conditions.) + OH OH CH2CH&H Hemiacetal Acetal

Answer 1

here carbonyl compounds reacts with alcohol and forms the hemi acetal and with excess alcohol and forms the acetal and the structures are as follows

Set 17 Hem Acetal [ + CHOH cm Hool Hofery" + Hockebokory Hem Acolle Loch Acetal c hler Woche - Acetal OCH Hemi Acetel OH Loh PM Hoa LOH + + SA CH Ht 2 - pentanare 12 di ot Hemi Acety - Acetal سب protecting of ketone group