(2)氯甲基化 冰醋酸,HPO4 hcho Hc +H20 56 (3)由重氮盐制备 N2BF∠ (1)NaNO,, HC I CH (2)HBF CH CHa (76%-84%) (89%)(2) 氯甲基化 CH2 Cl + HCHO + HCl 冰醋酸，H3 P O4 56% + H2 O (3) 由重氮盐制备 CH3 NH2 CH3 F CH3 N2 + BF4 - (1) NaNO2 ,HCl (2)HBF4  (76%-84%) (89%)