Dimethyl Sulfide → (S)-2,2,2-trifluoro-1-(7-hydroxy-1,2,7,8,9,10-hexahydrobenzo[f]isoquinolin-3(4H)-yl)ethanone

Participants

Reaction Steps

To a solution of (R)-2-methyl-CBS-oxazaborolidine (1M solution in toluene, 0.1 mL, 0.1 mmol) in 3 mL of toluene at −10 ° C. was added BH3.SMe2 (0.23 mL, 2.4 mmol). To this stirred solution was then added 3-(2,2,2-trifluoroacetyl)-1,2,3,4,9,10-hexahydrobenzo[f]isoquinolin-7(8H)-one (594 mg, 2 mmol)in 5 mL of dry THF dropwise while keeping the temperature around −10° C. After stirring at room temperature for 2 h, the reaction mixture was cooled down to −5 ° C. and was quenched with 1 ML of MeOH and was then evaporated to dryness and directly submitted to flash chomatography (SiO2, hexane/EtOAc=2:1 to 1:1) to afford (S)-2,2,2-trifluoro-1-(7-hydroxy-1,2,7,8,9,10-hexahydrobenzo[f]isoquinolin-3(4H)-yl)ethanone as a white solid.

Provenance & Evidence