反応 #1563908

反応方程式

iodine monochloride

N-(benzo[d][1,3]dioxol-5-yl)acetamide

→

N-(6-iodobenzo[d][1,3]dioxol-5-yl)acetamide

収率 22.0%

溶媒

methylene chloride

methylene chloride

acetic acid

反応条件

後処理

1. 1
   洗浄washed with saturated sodium thiosulfate (2×150 mL) and brine (150 mL)
2. 2
   乾燥The methylene chloride solution was dried (MgSO4)
3. 3
   その他evaporated
4. 4
   その他the residue was purified by column chromatography on silica gel (CH2Cl2/petroleum at 20/1)

実験手順

A 1.0 M solution of iodine monochloride in methylene chloride (72.6 mL) was added dropwise to a solution of N-(benzo[d][1,3]dioxol-5-yl)acetamide (10 g, 55.8 mmol) in methylene chloride (66 mL) and acetic acid (11 mL). The mixture was stirred under nitrogen overnight and then washed with saturated sodium thiosulfate (2×150 mL) and brine (150 mL). The methylene chloride solution was dried (MgSO4) and evaporated, and the residue was purified by column chromatography on silica gel (CH2Cl2/petroleum at 20/1) to obtain N-(6-iodobenzo[d][1,3]dioxol-5-yl)acetamide (3.7 g, 22%) as a white solid. LCMS: 306 [M+1]+; 1H NMR (DMSO-d6) δ 2.00 (s, 3H), 6.06 (s, 2H), 6.95 (s, 1H), 7.37 (s, 1H), 9.34 (s, 1H).

出典