Potassium Carbonate → HCID 86669228, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 1-methylethyl[(2S,4R)-1-acetyl-6-bromo-2-methyl-1,2,3,4-tetrahydro-4-quinolinyl]carbamate (for a preparation see intermediate 100) (1 g, 2.71 mmol) and 4-formylbenzeneboronic acid (0.487 g, 3.25 mmol) in ethanol (4.7 mL) and toluene (4.70 mL) was treated with K2CO3 (0.449 g, 3.25 mmol) and tetrakis(triphenylphosphine)palladium(0) (0.156 g, 0.135 mmol). The resulting mixture was stirred under nitrogen at 90° C. for 16 h then was cooled to room temperature and concentrated in vacuovacuo. The residue was partitioned between water (8.5 mL) and EtOAc (3 mL) and the resulting biphasic mixture was stirred at room temperature for 30 min then the insoluble residue was filtered off and dried under house vacuo at 40° C. for 1 hr to give 1-methylethyl[(2S,4R)-1-acetyl-6-(4-formylphenyl)-2-methyl-1,2,3,4-tetrahydro-4-quinolinyl]carbamate (1.0759 g, 2.59 mmol, 96% yield) as a light yellow solid.

Provenance & Evidence