Potassium Carbonate → Diethyl 4-(4-methyl-4-(methyldisulfanyl)pentyloxy)pyridine-2,6-dicarboxylate

HRID 336320ノート

反応式

HRID 336320 の反応式
CC1C=CC(S([O:11][CH2:12][CH2:13][CH2:14][C:15]([CH3:20])([S:17][S:18][CH3:19])[CH3:16])(=O)=O)=CC=1.O[C:22]1[CH:27]=[C:26]([C:28]([O:30][CH2:31][CH3:32])=[O:29])[N:25]=[C:24]([C:33]([O:35][CH2:36][CH3:37])=[O:34])[CH:23]=1.C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O>[CH3:20][C:15]([S:17][S:18][CH3:19])([CH3:16])[CH2:14][CH2:13][CH2:12][O:11][C:22]1[CH:23]=[C:24]([C:33]([O:35][CH2:36][CH3:37])=[O:34])[N:25]=[C:26]([C:28]([O:30][CH2:31][CH3:32])=[O:29])[CH:27]=1

参加物

5

反応物 3

HCID 11430Potassium CarbonateHCID 866712794-Methyl-4-(methyldisulfanyl)pentyl 4-methylbenzenesulfonateHCID 178469316HCID 178469316、化合物

生成物 1

HCID 86671278Diethyl 4-(4-methyl-4-(methyldisulfanyl)pentyloxy)pyridine-2,6-dicarboxylate収率 52.1%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
90 °C

実験手順

To a stirred solution of 4-methyl-4-(methyldisulfanyl)pentyl 4-methylbenzenesulfonate (5c) (0.48 g, 1.435 mmol) and diethyl 4-hydroxypyridine-2,6-dicarboxylate (5a)(0.343 g, 1.435 mmol) in anhydrous dimethylformamide (6.5 mL) was added Potassium carbonate (0.297 g, 2.152 mmol). The reaction was stirred at 90° C. for 18 hours. Then allowed to cool to ambient temperature and quenched with saturated ammonium chloride. The mixture was extracted three times with ethyl acetate. The extracts were dried with anhydrous sodium sulfate, filtered and concentrated under reduced pressure. Purification by silica gel chromatography (30% hexanes/ethyl acetate) yielded diethyl 4-(4-methyl-4-(methyldisulfanyl)pentyloxy)pyridine-2,6-dicarboxylate (5d)(300 mg, 52%); 1H NMR (400 Hz, CDCl3): δ 7.70 (s, 2H), 4.40 (q, 4H, J=7.2, 14.4 Hz), 4.07 (t, 2H, J=6. Hz), 2.35 (s, 3H), 1.86 (m, 2H), 1.70 (m, 2H), 1.38 (t, 6H, J=7.2 Hz), 1.27 (s, 6H); MS (m/z). found 424.1 (M+Na), 440.1 (M+K). See FIG. 5.

後処理

  1. temperatureto cool to ambient temperature
  2. customquenched with saturated ammonium chloride
  3. extractionThe mixture was extracted three times with ethyl acetate
  4. dry with materialThe extracts were dried with anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customPurification by silica gel chromatography (30% hexanes/ethyl acetate)

出典と根拠

ORDレコード
ord-044c8db726244bbba46161e39581dc8c
出典データセット
uspto-grants-2014_11
特許番号
US08889669B2

反応ノート

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