Acetic Acid → N-[(1S,2R)-1-benzyl-2-hydroxy-3-(1-propyl-butylamino)-propyl]-3-(2-oxo-pyrrolidin-1-yl)-5-pentyloxy-benzamide

Participants

Reaction Steps

To a solution of N-((1S,2R)-3-amino-1-benzyl-2-hydroxy-propyl)-3-(2-oxo-pyrrolidin-1-yl)-5-pentyloxy-benzamide (E182) (30 mg, 0.066 mmol, 1 equiv) in (CH2Cl)2 (5 ml) were added sodium triacetoxyborohydride (20 mg, 0.094 mmol, 1.4 equiv), 4-heptanone (10 μl, 0.070 mmol, 1.1 equiv) and CH3COOH (4 μl, 0.070 mmol, 1,1 equiv). The resulting mixture was stirred at room temperature for 92 hours, diluted with CH2Cl2, washed with saturated aqueous NaHCO3 solution, dried over MgSO4 and concentrated in vacuo. Purification of the residue by flash chromatography on silica gel (iso-hexane/ethyl acetate: 3/2) gave N-[(1S,2R)-1-benzyl-2-hydroxy-3-(1-propyl-butylamino)-propyl]-3-(2-oxo-pyrrolidin-1-yl)-5-pentyloxy-benzamide (4.2 mg, 11%) as a colourless oil. [M+H]+=552.2, RT=2.98 min

Provenance & Evidence