반응 #2336738

반응 방정식

(9-benzyl-1,8-diethyl-1,3,4,9-tetrahydro-pyrano[3,4-b]indol-1-yl)-acetic acid

→

title compound

수율 74.0%

2-(9-Benzyl-1,8-diethyl-1,3,4,9-tetrahydro-pyrano[3,4-b]indol-1-yl)-ethanol

수율 74.0%

용매

tetrahydrofuran

tetrahydrofuran

반응 조건

후처리

1. 1
   기타The mixture was quenched with 5% HCl solution
2. 2
   workup.STIRRINGstirred at room temperature for 20 minutes
3. 3
   추출It was extracted with ethyl acetate
4. 4
   세척washed with saturated sodium bicarbonate
5. 5
   건조The extracts were dried over magnesium sulfate
6. 6
   기타evaporated to dryness

실험 절차

To a solution of (9-benzyl-1,8-diethyl-1,3,4,9-tetrahydro-pyrano[3,4-b]indol-1-yl)-acetic acid (0.45 g, 1.2 mmol) in tetrahydrofuran at room temperature was added 1.0 M solution of borane-tetrahydrofuran complex in tetrahydrofuran and it was stirred at 90° C. for 4 hours. The mixture was quenched with 5% HCl solution and stirred at room temperature for 20 minutes. It was extracted with ethyl acetate and washed with saturated sodium bicarbonate. The extracts were dried over magnesium sulfate and evaporated to dryness. Flash chromatography on silica gel provided 0.321 g (74%) of the title compound as a solid. 1H NMR (500 MHz, CDCl3) δ 7.17 (m, 3H), 6.94 (d, 1H), 6.84 (m, 2H), 6.70 (t, 1H), 6.56 (d, 1H), 3.87 (m, 1H), 3.79 (m, 1H), 3.68 (dt, 1H), 3.64 (br, 1H), 3.41 (td, 1H), 2.93 (q, 2H), 2.43 (q, 2H), 2.04 (m, 1H), 1.93 (dt, 1H), 1.86 (m, 1H), 1.77 (m, 1H), 1.49 (m, 1H), 1.38 (m, 1H), 1.17 (t, 3H), 0.70 (t, 3H)

출처