Hydrochloric Acid → HCID 66869542, compound

Participants

Reaction Conditions

Reaction Steps

(2-Chloro-1-hydroxy-7-methoxy-1,2,3,4-tetrahydro-naphthalen-1-yl)-acetic acid ethyl ester (42.7 g, 142.9 mmol) is dissolved under an atmosphere of argon in pyridine (250 ml). Trifluoromethanesulfonic acid anhydride (30.7 ml, 185.8 mmol) is added during 30 minutes, while keeping the temperature at 25° C. with occasional cooling with a ice bath. After addition is complete, the reaction mixture is warmed to 50° C. for 2 h. TLC analysis indicates complete conversion of starting material. 2 M aqueous HCl (100 ml) is carefully added, and then the reaction mixture is concentrated to dryness on the rotary evaporator. The residue is taken up in 2 M aqueous HCl (100 ml) and extracted with EtOAc. The organic layer is dried over Na2SO4 and concentrated. Purification by FCC (EtOAc) affords the title compound. ES+−MS: 281.2, 283.2 [M+H]+.

Provenance & Evidence