반응 #161284

반응 방정식

sodium cyanoborohydride

acetic acid

formaldehyde

N-(3-amino-4-tert-butyl-phenyl)-4-oxo-1H-quinoline-3-carboxamide

formaldehyde

→

N-(3-dimethylamino-4-tert-butyl-phenyl)-4-oxo-1H-quinoline-3-carboxamide

수율 17.0%

용매

ether

CH2Cl2

methanol

반응 조건

후처리

1. 1
   workup.WAITAfter 4.7 h
2. 2
   세척washed with water (25 mL) and brine (25 mL)
3. 3
   건조dried (Na2SO4)
4. 4
   여과filtered
5. 5
   농축concentrated
6. 6
   기타The resulting red-brown foam was purified by preparative HPLC

실험 절차

To a suspension of N-(3-amino-4-tert-butyl-phenyl)-4-oxo-1H-quinoline-3-carboxamide (271) (600 mg, 1.8 mmol) in CH2Cl2 (15 mL) and methanol (5 mL) were added acetic acid (250 μL) and formaldehyde (268 μL, 3.6 mmol, 37 wt % in water). After 10 min, sodium cyanoborohydride (407 mg, 6.5 mmol) was added in one portion. Additional formaldehyde (135 μL, 1.8 mmol, 37 wt % in water) was added at 1.5 and 4.2 h. After 4.7 h, the mixture was diluted with ether (40 mL), washed with water (25 mL) and brine (25 mL), dried (Na2SO4), filtered, and concentrated. The resulting red-brown foam was purified by preparative HPLC to afford N-(3-dimethylamino-4-tert-butyl-phenyl)-4-oxo-1H-quinoline-3-carboxamide (485) (108 mg, 17%). 1H NMR (300 MHz, CDCl3) δ 13.13 (br s, 1H), 12.78 (s, 1H), 8.91 (br s, 1H), 8.42 (br s, 1H), 8.37 (d, J=8.1 Hz, 1H), 7.72-7.58 (m, 2H), 7.47-7.31 (m, 3H), 3.34 (s, 6H), 1.46 (s, 9H); HPLC ret. time 2.15 min, 10-100% CH3CN, 5 min run; ESI-MS 364.3 m/z (MH+).

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