Acetic Acid → HCID 71598746, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of ethyl 3,4-bis(benzyloxy)-5-iodo-1-(4-methoxyphenyl)-1H-pyrrole-2-carboxylate (28) (300 mg, 0.51 mmol) in DMF (5 mL) was added 2-(tributylstannyl)pyridine (280 μL, 0.87 mmol), copper(I) iodide (19.6 mg, 0.10 mmol) and dichlorobis(triphenylphosphine)palladium(II) (36.1 mg, 0.05 mmol). The mixture was heated in a microwave at 140° C. for 30 min, AcOH (2 mL) was added and the crude product was loaded onto a column of SCX (5 g). The column was washed with MeOH and then the product was eluted with 1% NH3 in MeOH. The resultant mixture was concentrated in vacuo and the residue was purified by silica gel chromatography (12 g, 20-100% EtOAc in isohexane) to afford ethyl 3,4-bis(benzyloxy)-1-(4-methoxyphenyl)-5-(pyridin-2-yl)-1H-pyrrole-2-carboxylate (UL1-082) (231 mg, 83%) as a pale yellow oil: m/z 535 (M+H)+ (ES+). 1H NMR (400 MHz, DMSO-d6) δ: 1H NMR (400 MHz, DMSO-d6) δ: 8.47-8.40 (m, 1H), 7.71-7.63 (m, 1H), 7.54-7.47 (m, 2H), 7.45-7.16 (m, 10H), 7.12-7.03 (m, 2H), 6.83-6.76 (m, 2H), 5.18 (s, 2H), 4.96 (s, 2H), 4.02 (q, J=7.1 Hz, 2H), 3.72 (s, 3H), 1.03 (t, J=7.1 Hz, 3H).

Provenance & Evidence