The process is carried out by using Soxhlet set, as experiment unit,with methyl sulfonic acid as a catalyst and magnesium sulfite as dehydrating agent,giving 97.

• 报道了合成乳酸丁酯的新方法,以乳酸和正丁醇为原料,在甲基磺酸催化下以亚硫酸镁为脱水剂,用索氏提取器进行回流合成。