Tetrahydrofuran → tert-butyl(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(5-formyl-7-methoxy-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate

関与物質

反応手順

To 20 mL of a tetrahydrofuran solution containing 1.05 g of tert-butyl(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(7-methoxy-5-((methoxy)(methyl)carbamoyl)-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate, 4.95 mL of 1 mol/L diisobutyl aluminum hydride/toluene was added at −78° C. and stirred for 1 hour. To the reaction mixture, aqueous saturated ammonium chloride solution and ethyl acetate were added. The organic layer was separated, washed sequentially with aqueous saturated sodium hydrogen carbonate solution and aqueous saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. The residue thus obtained was purified by silica gel column chromatography [Silica Gel; Kanto Chemical Co., Inc., Silica Gel 60N, eluent; chloroform:methanol=10:1], to give 0.65 g of tert-butyl(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(5-formyl-7-methoxy-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate as a colorless oil.

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