2-甲氧基-1,3-丁二烯 、 2,3-dimethylhydroquinone monobenzoate 以to give (±)-6-benzoyloxy-2-methoxy-2,7,8-trimethylchroman as a white powder, m.p. 101.5°-102.5°的产率得到(+/-)-6-benzoyloxy-2-methoxy-2,7,8-trimethylchroman
The (6-hydroxy-chroman-2-yl) acetic or carboxylic acid derivatives useful as antioxidants and a method for preparing these derivatives from hydroquinones and intermediates in this synthesis as well as the use of these derivatives as intermediates in the preparation of optically active alpha-tocopherol.