1,2-Dimethoxyethane → HCID 71284647, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of the boronic acid obtained in Step 1 (75 mg, 0.10 mmol), 4-cyanoiodobenzene (24 mg, 0.10 mmol) Pd(PPh3)4 (12 mg, 0.01 mmol), Na2CO3 (33 mg, 0.30 mmol), DME (0.9 mL) and H2O (0.1 mL) was stirred under argon at 85° C. for 2 hr. The mixture was then concentrated to dryness and chromatographed (silica gel, ethyl acetate in hexanes 0-15% gradient) to provide tert-butyl 5-(4,6-bis(benzyloxy)-5-((benzyloxy)carbonyl)-3-ethylpyridin-2-yl)-2-(4-cyanophenyl)-1H-indole-1-carboxylate (42 mg, yield: 55%). LC-MS 770.6 [M+H]+, RT 1.16 min. (1 min. Method). This was dissolved in diphenyl ether (1 mL) and heated to 210° C. for 0.5 hr. After cooling the mixture was chromatographed (silica gel, ethyl acetate in hexanes 0-50% gradient) to furnish 6-(2-(4-cyanophenyl)-1H-indol-5-yl)-5-ethyl-4-hydroxy-2-oxo-1,2-dihydropyridine-3-carboxylic acid (29 mg, yield: 80%).

Provenance & Evidence