反应详情

温度

20 °C

At 0° C., 1.95 g of lithium aluminium hydride were introduced in small portions into a solution of 12.6 g of ethyl 1-(2-propynyl)-3-trifluoromethyl-1H-pyrrole-4-carboxylate in 65 ml of tetrahydrofuran with stirring for 2 hours at 20° C. 10 ml of ethyl acetate were added to eliminate possible excess of hydride and the reaction mixture was poured into a saturated solution of sodium-potassium double tartrate. After extraction with ethyl acetate, the extracts were concentrated to dryness by distillation under reduced pressure. The residue was chromatographed over silica and eluted with a mixture of hexane and ethyl acetate (7-3) to obtain 5.7 g of 1-(2-propynyl)-3-trifluoromethyl-1H-pyrrole-4-methanol melting at 45° C.

1. extractionAfter extraction with ethyl acetate
2. concentrationthe extracts were concentrated to dryness by distillation under reduced pressure
3. customThe residue was chromatographed over silica
4. washeluted with a mixture of hexane and ethyl acetate (7-3)