Hydrochloric Acid → Ethyl 2-(5-(4-Acetamidophenylsulfonamido)-1,3,4-thiadiazol-2-yl)acetate

HRID 1854279

反応式

HRID 1854279 の反応式
[C:1]([NH:4][C:5]1[CH:10]=[CH:9][C:8]([S:11](Cl)(=[O:13])=[O:12])=[CH:7][CH:6]=1)(=[O:3])[CH3:2].[NH2:15][C:16]1[S:20][C:19]([CH2:21][C:22]([O:24][CH2:25][CH3:26])=[O:23])=[N:18][N:17]=1.Cl>N1C=CC=CC=1>[C:1]([NH:4][C:5]1[CH:10]=[CH:9][C:8]([S:11]([NH:15][C:16]2[S:20][C:19]([CH2:21][C:22]([O:24][CH2:25][CH3:26])=[O:23])=[N:18][N:17]=2)(=[O:13])=[O:12])=[CH:7][CH:6]=1)(=[O:3])[CH3:2]

参加物

5

反応物 3

HCID 313Hydrochloric AcidHCID 8481N-Acetylsulfanilyl chlorideHCID 292304Ethyl 2-(5-amino-1,3,4-thiadiazol-2-yl)acetate

生成物 1

HCID 53323731Ethyl 2-(5-(4-Acetamidophenylsulfonamido)-1,3,4-thiadiazol-2-yl)acetate収率 76%

試薬・触媒・溶媒 1

HCID 1049Pyridine溶媒

実験手順

To a solution of p-acetamidobenzenesulfonyl chloride (275 mg, 1.18 mmol) in pyridine (5 mL) was added ethyl 2-(5-amino-1,3,4-thiadiazol-2-yl)acetate (200 mg, 1.07 mmol). The reaction mixture was stirred at room temperature for 4.5 h, then 2 M HCl (10 mL) was added to quench the reaction. The mixture was extracted with ethyl acetate (3×50 mL). The organic extracts were washed with water (20 mL), brine (20 mL), dried over Na2SO4, filtered, and concentrated. The residue was purified by chromatography over silica gel (70-230 mesh) eluted with CH2Cl2:methanol 19:1 to give the product as a solid, mp 156-157° C., in 76% yield (312 mg, 0.81 mmol); 1H NMR (300 MHz, DMSO-d6) δ 1.20 (t, 3H, J=7.0 Hz), 2.07 (s, 3H), 4.06 (s, 2H), 4.15 (q, 2H, J=7.0 Hz), 7.72 (m, 4H), 10.29 (s, 1H); 13C NMR (75 MHz, DMSO-d6) δ 14.0, 24.1, 35.7, 61.3, 118.6, 127.0, 135.5, 142.9, 151.6, 167.8, 168.1, 169.0; MS (LCQ, ESI+) Calcd for C14H17N4O5S2 385.1. found 385.1 (M+H)+; HRMS (ESI+, m/z) Calcd for C14H17N4O5S2 385.0640. found 385.0638 (M+H)+.

後処理

  1. customto quench
  2. customthe reaction
  3. extractionThe mixture was extracted with ethyl acetate (3×50 mL)
  4. washThe organic extracts were washed with water (20 mL), brine (20 mL)
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe residue was purified by chromatography over silica gel (70-230 mesh)
  9. washeluted with CH2Cl2:methanol 19:1

出典と根拠

ORDレコード
ord-e32ae119b644410d857fa51992ae981c
出典データセット
uspto-grants-2015_02
特許番号
US08962663B2

関連ノート

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