Water → HCID 178525088, compound

Participants

Reaction Conditions

Reaction Steps

Thiophene-3-carboxaldehyde (1 ml; 1 eq.) is added to a solution of benzyl (2S)-2-amino-4-(4-phenyl-1H-imidazol-2-yl)butanoate in the form of a free base (3.6 g; 1 eq.) in tetrahydrofuran (hereafter THF, 40 ml). The mixture is stirred for 15 hours at approximately 20° C. and diluted by adding 50 ml of tetrahydrofuran. NaBH(OAc)3 (4.73 g; 2 eq.) is then added. After 1 hour of stirring at approximately 20° C., the reaction is stopped by adding water (40 ml) and ethyl acetate is then added (100 ml). After decantation and extraction, the combined organic phases are washed with salt water, dried over Na2SO4 then evaporated under reduced pressure at 40° C. Flash chromatography purification on silica gel (eluent: ethyl acetate/heptane 9:1) yields the expected compound in the form of a yellow oil (3.08 g; 66% yield).

Provenance & Evidence