反应详情

2',3'-dichloro-4'-methylthio-2-cyclopentylacrylophenone is prepared following substantially the same procedure described in Example 3, Step B, using the following substances: 2',3'-dichloro-4'-methylthio-2-cyclopentylacetophenone (54.5 g., 0.18 mole), paraformaldehyde (21.6 g., 0.72 mole), concentrated sulfuric acid (9.65 g.) and dioxane (450 ml.).