翻译这段话成英文：在一氯甲烷溶液中加入苯甲酸衍生物（10 mmol，1.0 equiv）、DMF（1滴）和草酰氯（15 mmol，1.5 equiv），热搅拌1-2小时，挥发溶剂蒸馏去除；将得到的粗醛...

Add a derivative of benzoic acid (10 mmol, 1.0 equiv), DMF (1 drop) and chloroacetyl chlorid (15 mmol, 1.5 equiv) to a dichloromethane solution and heat and stir for 1-2 hours, then distill the solvent to remove; dissolve the crude aldehyde chlorid in dichloromethane again, add methylamine (15 mmol