Triethyl phosphonoacetate → HCID 58557604, compound

Participants

Reaction Steps

To a slurry of NaH (0.034 g, 0.85 mmol) in THF (5 mL) was added ethyl 2-(diethoxyphosphoryl)acetate (0.177 mL, 0.886 mmol) at rt. After about 30 min, a solution of (3R,4S)-3-ethyl-4-(6-tosyl-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazin-1-yl)cyclopentanone (0.300 g, 0.708 mmol, Preparation #25) in THF (1 mL) was added. After about 4 h, EtOAc (20 mL) and saturated aqueous NaHCO3 (20 mL) were added. The organic layer was separated, concd in vacuo, and purified by chromatography on silica gel (40 g) eluting with EtOAc/heptane/DCM (2:1:1) to provide (E)-ethyl 2-((3R,4S)-3-ethyl-4-(6-tosyl-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazin-1-yl)cyclopentylidene)acetate (0.260 g, 74%). LC/MS (Table 1, Method a) Rt=2.54 min; MS m/z: 494 (M+H)+.

Provenance & Evidence