反应详情

2.924 g of pyrrole-3-carboxaldehyde (J. Org. Chem. 1981, Vol. 46, p. 839) dissolved in 45 ml of tetrahydrofuran and 1.488 g of sodium hydride as 50% in oil were admixed and then were stirred for 10 minutes cold, then for 40 minutes at room temperature. After cooling, 2.5 ml of propargyl bromide were added with stirring at 5 C. for 90 minutes. A further 2 ml of propargyl bromide were added with stirring at 5° C. for 1 hour and the mixture was poured into water and extracted with methylene chloride. The solvent was distilled off at atmospheric pressure to obtain 2.868 g of 1-(2-propynyl)-1H-pyrrole-3-carboxaldehyde which was purified by chromatography on silica gel and elution with a 65-35 hexane-ethyl acetate mixture to obtain 2.868 g of the said product.

1. waitfor 40 minutes at room temperature
2. temperatureAfter cooling
3. stirringwith stirring at 5 C
4. waitfor 90 minutes
5. stirringwith stirring at 5° C. for 1 hour
6. extractionextracted with methylene chloride
7. distillationThe solvent was distilled off at atmospheric pressure