The present disclosure concerns a process for preparing a pyrethroid, said process comprising the steps of: a) reacting an acid chloride with an alcohol in a suitable organic solvent and in the presence of a nitrogen acid acceptor in a temperature range from 0°C to 40°C; and b) washing with water and/or an aqueous basic solution, wherein a suitable amount of a polyamine (W) H2N-(CH2)b-Ae-[(CH2)c-A-]p-(CH2)d-NH2, where A is -NH- or -O-, b and d are independently an integer in the range of 1 -5, c is an integer in the range of 2-5, e is an integer from 0 to 1, p is an integer in the range of 0-5, is added in step a) or b) or after step a) and before step b).
本公开涉及一种制备拟
除虫菊酯的工艺,所述工艺包括以下步骤:a)在适当的有机溶剂中,在0°C至40°C的温度范围内,将酸
氯化物与醇在氮酸受体的存在下反应;b)用
水和/或
水性碱性溶液洗涤,其中在步骤a)或b)或步骤a)之后且步骤b)之前加入适量的
多胺(W)
H2N-(
CH2)b-Ae-[( )c-A-]p-( )d-NH2,其中A为-NH-或-O-,b和d分别为1-5范围内的整数,c为2-5范围内的整数,e为0至1的整数,p为0-5范围内的整数。