Triethylsilane → ethyl 2-(2-(2-hydroxyethyl)-3,5-dimethyl-4-(4-(pyrrolidin-1-ylsulfonyl)benzyl)-1H-pyrrol-1-yl)acetate

関与物質

反応条件

反応手順

To a flame-dried vial was charged with DCM (2 ml) and trimethylsilyl trifluoromethanesulfonate (0.081 ml, 0.448 mmol) was added at 0° C., followed by a solution of ethyl 2-(2-methyl-6,7-dihydropyrano[4,3-b]pyrrol-1(4H)-yl)acetate (50 mg, 0.224 mmol) and 4-(pyrrolidin-1-ylsulfonyl)benzaldehyde (53.6 mg, 0.224 mmol) in CH2Cl2 (5 ml) (cannulated), the mix was stirred at 0° C. for 15 min, neat triethylsilane (0.143 ml, 0.896 mmol) was added slowly, stirred for 30 min at 0° C., then slowly warmed to r.t. TLC confirmed that reaction was done. Therefore, it was quenched with sat. NaHCO3, extracted with DCM. Combined DCM was dried with Na2SO4, filtered and concentrated under vacuum. The residue was chromatographed on silica using a Biotage automated system (5-30-50% ethyl acetate/hexanes) to give ethyl 2-(2-(2-hydroxyethyl)-3,5-dimethyl-4-(4-(pyrrolidin-1-ylsulfonyl)benzyl)-1H-pyrrol-1-yl)acetate (34 mg, 0.076 mmol, 33.8% yield).

情報源と証拠