反应 #7092

反应方程式

sodium hydrogen carbonate

spiro[cyclopentane-1,3′-[3H]indol]-2′(1′H)-one

sodium acetate

bromine

→

subtitled compound

收率 105.0%

5-Bromo-spiro[cyclopentane-1,3′-[3H]indol]-2′(1′H)-one

收率 105.0%

溶剂

acetic acid

acetic acid

反应条件

后处理

1. 1
   萃取extracted with EtOAc (×2)
2. 2
   洗涤the combined organic layers were washed with water, sat. sodium hydrogen carbonate solution, water
3. 3
   干燥dried (MgSO4)
4. 4
   其他evaporated

实验过程

A solution of spiro[cyclopentane-1,3′-[3H]indol]-2′(1′H)-one (0.27 g, 1.4 mmol) and sodium acetate (0.12 g, 1.46 mmol) in acetic acid (10 cm3) was treated with bromine (0.24 g, 1.51 mmol) in acetic acid (2 cm3). After 30 min. the mixture was poured into sat. sodium hydrogen carbonate solution and extracted with EtOAc (×2), the combined organic layers were washed with water, sat. sodium hydrogen carbonate solution, water, dried (MgSO4), and evaporated to give the subtitled compound (0.37 g, 1.47 mmol, 96%) as an off-white solid which was used without further purification: 1H NMR (CDCl3) δ 1.8–2.27 (m, 8H), 6.79 (d, J=8 Hz, 1H), 7.30–7.39 (m, 2H), 8.63 (br s, 1H).

来源