... The hydrolysis of ortho—esters with a phenolic leaving group has been studied in dioxane/water Acta Chemica Scandinavica A41 (1987) 93—97 solvents.8 Pronounced general acid catalysis was observed in the hydrolysis of ... 5. Lonnberg, H. and Pohjola, V. Acta Chem. ... Chem. ...