反应详情

HCl (4 M in 1,4-dioxane) (8.38 mL, 33.5 mmol) was added to a warm solution of N-(7′-bromo-3′,4′-dihydro-1′H-spiro[cyclopropane-1,2′-naphthalene]-1′-ylidene)-2-methylpropane-2-sulfinamide (Intermediate 10, 1.19 g, 3.35 mmol) in dry dioxane (12 mL) under Ar (g). The mixture was stirred at r.t. for 40 min after which diethyl ether was added. The precipitate was filtered and washed with diethyl ether and then taken up in CH2Cl2 and washed twice with sat. aq. NaHCO3. The organic phase was dried (Na2SO4), filtered and concentrated to give the title compound (0.717 g, 85% yield). MS (ES+) m/z 250.0 [M+H]+.

1. additionwas added
2. filtrationThe precipitate was filtered
3. washwashed with diethyl ether
4. washwashed twice with sat. aq. NaHCO3
5. dry with materialThe organic phase was dried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated