反应详情

178 mg (4.70 mmol) lithium aluminium hydride were given to 5 ml tetrahydrofuran (THF) and stirred at room temperature (r.t.) for 20 min. A solution of 590 mg (2.35 mmol) 5-(4-trifluoromethyl-phenyl)-pyridine-2-carbaldehyde in 5 ml THF was added drop by drop within 15 min., and the mixture stirred for 3 h. 9 ml conc. sodium chloride solution was added slowly at 0° C. and stirring continued for 60 min. The mixture was adjusted to pH=5 by addition of conc. HCl. A formed salt precipitate was isolated by filtration and washed with THF. The combined THF-solutions were evaporated, the residue extracted twice with ethyl acetate, the organic phase dried (sodium sulphate), evaporated, and the obtained material (270 mg, 45%) used without further purification.

1. stirringthe mixture stirred for 3 h
2. stirringstirring
3. waitcontinued for 60 min
4. customA formed salt precipitate was isolated by filtration
5. washwashed with THF
6. customThe combined THF-solutions were evaporated
7. extractionthe residue extracted twice with ethyl acetate
8. dry with materialthe organic phase dried (sodium sulphate)
9. customevaporated
10. customthe obtained material (270 mg, 45%) used without further purification