Aluminium lithium hydride → HCID 57209067, compound

Participants

Reaction Steps

A suspension of 230 mg (6.07 mmol) of LiAlH4 in 5 ml of abs. THF is added dropwise to a suspension of 600 mg (1.6 mmol) of 6-(3-chloro-phenyl-amino)-9-ethyl-[(S)-2-carbamoyl-pyrrolidin-1-yl]-9H-purine (cf. Example 64) in 15 ml of abs. THF, and the mixture is stirred at 80° C. for 24 h. Thereafter, 10 ml of ice/water are cautiously added dropwise and the reaction mixture is poured onto 50 ml of ice/water. The mixture is extracted three times with ethyl acetate (100 ml each time). The combined organic extracts are washed with aqueous sodium bicarbonate solution, water and saturated sodium chloride solution and dried over sodium sulfate. After filtration, the filtrate is concentrated under reduced pressure. The resulting crude product (oil) is purified by means of column chromatography (silica gel), digestion in diethyl ether/hexane and RP-MPLC (medium pressure chromatography, Lichroprep® RP-18 (irregular silica gel support material, Merck, Darmstadt, Germany)). 2-[(S)-2-Aminomethyl-pyrrolidin-1-yl]-6-(3-chloro-phenyl-amino)-9-ethyl-9H-purine is obtained as an oil; FAB-MS: (M+H)+=372, HPLC: tret (grad20/2)=11.25 minutes; [α]D20=−56.1° [DMSO, c=0.51].

Provenance & Evidence