反应详情

The general procedure 1 was then followed using 1-chloro-2-dimethylaminoethane (6 mmol, 0.65 g), ethyl-2-(1H-indol-3-yl)-2-oxoacetate (6 mmol, 1.3 g) and Cs2CO3 (6.6 mmol, 2.15 g). The purification was achieved by column chromatography (petrolether:ethylacetate:diethylamine 6:3:1) to yield ethyl-2-{1-[2-(dimethylamino)-ethyl]-1H-indol-3-yl}-2-oxoacetate (3.7 mmol, 62%) as pale yellow crystals. Mp=71-72° C. IR {tilde over (ν)} [cm−1]=3139; 3044; 2977; 2946; 2797; 2772; 1727; 1641. EI-MS m/z (rel. int.)=288 (19.15%; M+•). 1H NMR (300 MHz, CDCl3) 8.45 (m; 2H; indole-H); 7.37 (m; 3H; indole-H); 4.41 (q; 3J=7.1 Hz; 2H; OCH2CH3); 4.26 (t; 3J=6.9 Hz; 2H; indole-CH2CH2N); 2.76 (t; 3J=6.9 Hz; 2H; indole-CH2CH2N); 2.31 (s; 6H); 1.44 (t; 3H; 3J=7.1 Hz; OCH2CH3).

1. customThe purification