以二氢香豆素为原料,经皂化水解开环,形成钠盐。在低温条件下,钠盐用盐酸酸化形成含有邻羟基的3-(2-羟基苯基)-丙酸。考察了不同浓度的氯化钠溶液,对3-(2-羟基苯基)-丙酸产率的影响,同时还考察了原料投料比对产品产率的影响。在优化条件下3-(2-羟基苯基)-丙酸的最高产率达99.85%。 To dihydrocoumarin as raw material, the saponification hydrolysis ring, the formation of sodium salt. At low temperatures, the sodium salt is acidified with hydrochloric acid to form 3- (2-hydroxyphenyl) -propionic acid containing o-hydroxy groups. The effects of different concentrations of sodium chloride solution on the yield of 3- (2-hydroxyphenyl) -propionic acid were investigated. At the same time, the effect of feed ratio on the yield of product was also investigated. Under optimized conditions, the highest yield of 3- (2-hydroxyphenyl) -propionic acid reached 99.85%.