反应详情

A mixture of 40g. of p-(benzyloxy)phenol, 33.6 g. of 2-methoxybutadiene, and 30 ml. of benzene was sealed in a glass tube under N2. The tube was heated at 160°-165° for 20 hours, cooled and opened. The yellow solution was chromatographed on silica gel with 97.5:2.5 benzene-ethyl acetate to give (±)-6-benzyloxy-2-methoxy-2-methylchroman, identical with the material prepared as described in Example 44, as 34.5 g. of pale yellow oil.

1. temperatureThe tube was heated at 160°-165° for 20 hours
2. temperaturecooled
3. customThe yellow solution was chromatographed on silica gel with 97.5:2.5 benzene-ethyl acetate