تفاعل #161284

معادلة التفاعل

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

المردود 17.0%

المذيبات

ether

CH2Cl2

methanol

ظروف التفاعل

المعالجة

1. 1
   workup.WAITAfter 4.7 h
2. 2
   غسيلwashed with water (25 mL) and brine (25 mL)
3. 3
   تجفيفdried (Na2SO4)
4. 4
   ترشيحfiltered
5. 5
   تركيزconcentrated
6. 6
   أخرىThe resulting red-brown foam was purified by preparative HPLC

الإجراء التجريبي

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+).

المصدر