Water → HCID 89435362, compound

Participants

Reaction Steps

To a solution (3 ml) of carbonic acid 7-[4-(4-benzo[b]thiophen-4-ylpiperazin-1-yl)butoxy]-2-oxo-3,4-dihydro-2H-quinolin-1-ylmethyl ester phenyl ester (0.29 g) synthesized in the same manner as in Example 5 in THF were added piperidine (0.5 ml) and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) (0.05 ml), and the mixture was stirred at room temperature for 16 hr. Water was added and the reaction mixture was extracted with ethyl acetate, dried over sodium sulfate, and concentrated under reduced pressure. The residue was purified by moderate-pressure basic silica gel column chromatography (hexane:ethyl acetate=1:0 to 1:1) to remove phenol, and concentrated under reduced pressure. The residue was purified by moderate-pressure silica gel column chromatography (hexane:ethyl acetate=1:0 to 0:1) to give the title compound (yield 0.21 g, 74%) as a colorless oil.

Provenance & Evidence