反应详情

温度

25 °C

A solution of 1,4-cyclohexanedione monoethylene ketal (31.2 g, 0.2 mole) in 100 ml dry THF was added to a -60° C. solution of the Grignard reagent prepared from magnesium metal (7.2 g, 0.3 mole) and 5-bromo-1,3-benzodioxole (60.3 g, 0.3 mole). The mixture was allowed to warm to 25° C. and quenched with saturated NH4Cl and extracted with ether. The extracts were dried with Na2SO4 and the solvent removed in vacuo. The residue was crystallized from isopropyl ether to give the product (47.5 g, 85%, m.p: 103°-104° C.).

1. customquenched with saturated NH4Cl
2. extractionextracted with ether
3. dry with materialThe extracts were dried with Na2SO4
4. customthe solvent removed in vacuo
5. customThe residue was crystallized from isopropyl ether