Question

Draw the complete arrow-pushing mechanism.

a. Other disaccharides can also be hydrolyzed under acidic conditions. Draw the complete arrow-pushing mechanism (including curved arrows, formal charges, and important resonance contributors) for the acid-catalyzed hydrolysis of the disaccharide shown below to give the products shown (note the coefficient!). СН,ОН — о СН,ОН о н н н н КВН н 8н н . нсі (ад.), Н,0 80 °C , СН,ОН но, н , Bн н . Он и он н Он н . и он н оно ОН

Answer 1

Que:-a Ans:- below disaccharides is maltose, which on hydrolysis gives two mole of a -D(+)-glucose monosaccharides unit. CH2OH CH2OH CH2OH H 2H 1 / HCl(aq), H2O အ2 k 80 °C M pH OH OH OH a-D(+)-glucose OH a-D(+)-glucose OH a-D(+)-glucose Mechanism:- Step:-1 First step is protonation step and yields oxonium ion ပ - ပြန် ခု – ခု၊ ( I - CH2OH CH2OH CH2OH CH2OH Ht from HCl(aq) OH * / OH OH OH ОН oH OH OH oxonium ion step-2 CH2OH CH2OH CH2OH CH2OH H он + N OH он OH OH он OH он ОН OH a-D(+)-glucose oxonium ion step:-3 CH2OH CH2OH addition SoH, OH 6- OH OH OH + step:-4 CH2OH CH2OH H H H 4 deprotonation - H+ = 6-2- OH :OH, OH 61 ) OH a-D(+)-glucose