反应详情

A solution of N-(diphenylmethylene)aminoacetonitrile (5.84 g, 26.0 mmol, commercially available from Aldrich) in THF (20 mL) and hexamethylphosphoramide (HMPA) (5.43 mL, 31 mmol) at −78° C. was reacted with lithium diisopropylamide (LDA) (15.4 mL of a 2M soln in heptane/THF/ethylbenzene) (commercially available from Aldrich). After 1 h, 5-(1-chloro-ethyl)-quinoline (Intermediate E1) (4.15 g, 21.7 mmol) in THF (15 mL) was introduced by dropwise addition. The mixture was kept at −78° C. for 5 m before removal of the cold bath. After 5 m, the mixture was quenched with cold water and extracted with ethyl acetate (3×). The organic solution was dried over MgSO4, filtered and concentrated to give 2-(benzhydrylidene-amino)-3-quinolin-5-yl-butyronitrile that was used in the next step without further purification.

1. customThe mixture was kept at −78° C. for 5 m before removal of the cold bath
2. customAfter 5 m, the mixture was quenched with cold water
3. extractionextracted with ethyl acetate (3×)
4. dry with materialThe organic solution was dried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated