反应详情

4-Hydroxy-3-(2-hydroxy-1,1-dimethylethyl)phenyl methanesulphonate (10.4 parts) (from Example 1) was reacted with trimethyl orthoformate (127 parts) in the presence of p-toluenesulphonic acid (0.05 parts) as in Example 20 to produce 4,5-dihydro-2-methoxy-5,5-dimethyl-1,3-benzodioxepin-7-yl methanesulphonate (9.5 parts, 79% yield) as a colourless oil.