Triethylamine → 2,3,4,5,6-Pentafluorophenyl 3-[(fluoren-9-ylmethyl)oxycarbonyl]pyrrolo[4,5-e]indoline-7-carboxylate

Participants

Reaction Steps

Pentafluorophenyl trifluoroacetate (0.3 mL, 1.75 mmol) was added to a solution of acid 9 (0.3 g, 0.7 mmol) and triethylamine (0.3 mL, 2.1 mmol) in 4 mL of anhydrous DMF. After 1 h DMF was evaporated and the residue chromatographed on silica eluting with 2% acetone in methylene chloride. Concentration of the pure product fraction and drying afforded 0.29 g (70%) of PFP ester 10 as a yellow solid.

Provenance & Evidence