Đáp án B
- H2NCH2COOC2H5 (X) + NaOH → t ° H2NCH2COONa (X1) + C2H5OH.
–H2CH2COONa(X1)+2HCldư → ClH3NCH2COOH (X2) + NaCl ⇒ chọn B.
– ClH3NCH2COOH (X2) + CH3OH (HCl khan) ⇄ ClH3NCH2COOCH3 (X3) + H2O.
– ClH3NCH2COOCH3 (X3) + KOH → H2NCH2COOK + KCl + H2O