反应详情

To a solution of 1-benzyloxy-2,3,4-trifluorobenzene in appropriate inert solvent is added strong base (such as LDA, n-BuLi, LiHDMS) at low temperature (−50-−80° C., prefer −78° C.) under nitrogen atmosphere. The stirring is maintained at this temperature for several hours (0.5-12 h, prefer 0.5-2 h). The mixture is transferred to a bottle with dry ice and the resulting mixture is stirred for some time (such as 3-12 h, prefer 5-10 h). 5-Benzoxy-2,3,4-trifluorobenzoic acid is obtained after conventional workup.

1. temperatureThe stirring is maintained at this temperature for several hours (0.5-12 h, prefer 0.5-2 h)