Triethylamine → HCID 67507701, compound

Participants

Reaction Conditions

Reaction Steps

Compound 11 (0.42 g, 0.96 mmol) was mixed with 4,4′-dimethoxytrityl chloride (0.82 g, 2.41 mmol) and dried over P2O5 under reduced pressure. The mixture was dissolved in anhydrous pyridine (3 mL) and stirred at 45° C. for 18 h under an atmosphere of argon. The reaction mixture was cooled to room temperature and diluted with EtOAc (40 mL) and washed with saturated aqueous NaHCO3 (60 mL) and brine (40 mL), dried over Na2SO4, filtered and concentrated. The residue obtained was purified by silica gel column chromatography and eluted first with 50% EtOAc in hexanes and then with 5% methanol in CH2Cl2. The product obtained was dissolved in a mixture of triethylamine trihydrofluoride (1.38 mL, 8.44 mmol) and triethylamine (0.58 mL, 4.22 mmol) in THF (8.4 mL). After 72 h the mixture was diluted with EtOAc (60 mL), washed with water (40 mL), saturated aqueous NaHCO3 (40 mL) and brine (40 mL) then dried over Na2SO4, filtered and evaporated. The residue obtained was purified by silica gel column chromatography and eluted with 70% EtOAc in hexanes to yield Compound 12 (0.44 g, 73%). ES MS m/z 631.2 [M+H]+.

Provenance & Evidence