反応 #1772012

反応方程式

2-(4′-nitrophenyl)-6-hydroxy benzothiazole

acetone

K2CO3

MsCl

→

2-(4-nitrophenyl)-6-methylsulfoxy benzothiazole

収率 68.0%

反応条件

後処理

1. 1
   ろ過the reaction mixture was filtered
2. 2
   濃縮The filtrate was concentrated
3. 3
   その他the residue was purified by flash column (silica gel, hexane:ethyl acetate=4:1)

実験手順

To a solution of 2-(4′-nitrophenyl)-6-hydroxy benzothiazole (50 mg, 0.18 mmol) dissolved in acetone (7 mL, anhydrous) was added K2CO3 (100 mg, 0.72 mmol, powdered) and MsCl (200 ul). After stirring for 2 hrs, the reaction mixture was filtered. The filtrate was concentrated and the residue was purified by flash column (silica gel, hexane:ethyl acetate=4:1) to give 2-(4-nitrophenyl)-6-methylsulfoxy benzothiazole (44 mg, 68%) as pale yellow solid. 1HNMR (30 MHz, acetone-d6) δ (ppm): 8.50-8.40 (m, 4H), 8.29 (d, J=2.3 Hz, 1H), 8.23 (d, J=8.9 Hz, 1H), 7.61 (dd, J1=2.3 Hz, J2=8.9 Hz, 1H).

出典