5以乙醇或苯为原料合成下列化合物: (1) H2N-CH2 CH2-NH2 (2)( CH3CH2)2NH (3)邻硝基苯胺 OH (6)4二甲氨基-2羧基偶氮苯 6写出下列消去反应的主要产物: △ (1)CH3 CH2N(CH3)2 CH2CH(CH3)2OH (2)(CH3)2 CHCHCH3 △ N(CH2)3OH (3)(CH3CH2)3NCH2 CH2CCH2O △ OH- H3C CH3 CH(CH3) N(CH3)3OH CH3 7指出下列反应的机理 (1) R-CCHN h△RCH2CO2H5.以乙醇或苯为原料合成下列化合物: (1) H2N CH2CH2 NH2 (CH3CH2 ) (2) 2NH (3) 邻硝基苯胺 Br Br CH3 (4) (5) OH NO2 (6) 4-二甲氨基-2'羧基偶氮苯 6.写出下列消去反应的主要产物: (1) CH3CH2N(CH3 )2CH2CH(CH3 )2OH - ? Δ (2) N(CH2 )3OH - ? (CH Δ 3 )2CHCHCH3 (3) ? Δ (CH3CH2 )3NCH2CH2CCH2O - O (4) N ? Δ H3C CH3 OH - (5) ? CH(CH3 )2 Δ N(CH3 )3OH - (6) ? Δ N H CH3 H3C CH3 ? Δ N(CH3 )2 CH3 O (7) 7.指出下列反应的机理: (1) Δ R CCHN2 O hv或 H2O RCH2CO2H (2) O CH2N2 O + O CH2