分离，提纯 CH3CH2NH2 (CH3CO)2O CH3CH2NHCCH3 (CH3CH2)3N (CH3CH2)3N HCI 有机相 水相 CH3CH2NHCCH3 (CH3CH2)3NCI NaoH△ NaOH CH3CH2NH2 (CH3CH2)3N 鉴定和胺基的保护 0 coH,NH2+CH,co20一→C NHCCH3+CH3COOH m.p.=114 HNO3 ○it-8w-O48-am H2S04 0 NH2 NHCCH3 1)H30t NO2 2)HO,△ N20CH3CH2NH2 (CH3CH2)3N (CH3CO)2O CH3CH2NHCCH3 (CH3CH2)3N O HCl 有机相 水相 CH3CH2NHCCH3 O (CH3CH2)3NCl + NaOH  NaOH CH3CH2NH2 (CH3CH2)3N 分离，提纯 鉴定和胺基的保护 C6H5NH2 + (CH3CO) 2O NHCCH3 O + CH3COOH m.p. = 114 N2O NH2 HNO3 H2SO4 NHCCH3 O NO2 1) H3O+ 2) HO,  NH CCH3 O H N C CH3 O +