Toluene → HCID 59190391, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 7-((1S)-1-(4-bromophenyl)ethylamino)-2-methyl-4-phenylhept-1-en-4-ol (111.7 mg, 0.279 mmol) in anhydrous acetonitrile (7 mL) was cooled to 0° C. Triethylamine (78 μL, 2 equiv) and 20% phosgene in toluene solution (161 μL, 1.1 equiv) were added sequentially and slowly. After stirring 2 h at 0° C., NaH (60% in mineral oil, 22 mg, 2 equiv) was added. The mixture was stirred overnight and the ice bath was allowed to melt. LC-MS showed the reaction was complete. The mixture was cooled to 0° C. again, quenched by addition of satd aq NH4Cl (2 mL), concentrated to remove the organic solvents, diluted with ether (10 mL), washed with 1% HCl (3 mL), satd aq NaHCO3 (2 mL) and brine (2 mL), and dried over Na2SO4. After filtration and concentration, the residue was purified by chromatography on a 12-g silica cartridge, eluted with a 15˜40% EtOAc in hexanes gradient, to afford 3-((1S)-1-(4-bromophenyl)ethyl)-7-(2-methylallyl)-7-phenyl-1,3-oxazepan-2-one (49.6 mg, 42%) as a mixture of two diastereomers.

Provenance & Evidence