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1,1'-Carbonyldiimidazole → (2-Oxo-1,2,4,5-tetrahydroimidazo[1,5,4-de][1,4]benzoxazin-4-yl)methyl 4-methylbenzenesulfonate

HRID 896011
ノート
印刷プレビュー

反応式

HRID 896011 の反応式
[NH2:1][C:2]1[C:7]2[NH:8][CH:9]([CH2:12][O:13][S:14]([C:17]3[CH:22]=[CH:21][C:20]([CH3:23])=[CH:19][CH:18]=3)(=[O:16])=[O:15])[CH2:10][O:11][C:6]=2[CH:5]=[CH:4][CH:3]=1.C(N(CC)C(C)C)(C)C.[C:33](N1C=CN=C1)(N1C=CN=C1)=[O:34]>C(Cl)Cl>[CH3:23][C:20]1[CH:21]=[CH:22][C:17]([S:14]([O:13][CH2:12][CH:9]2[N:8]3[C:33](=[O:34])[NH:1][C:2]4=[CH:3][CH:4]=[CH:5][C:6](=[C:7]34)[O:11][CH2:10]2)(=[O:16])=[O:15])=[CH:18][CH:19]=1
参加物実験手順後処理出典と根拠反応ノート

参加物

5

反応物 3

HCID 682631,1'-CarbonyldiimidazoleHCID 81531DiisopropylethylamineHCID 20814150Toluene-4-sulfonic acid 5-amino-3,4-dihydro-2H-benzo[1,4]oxazin-3-ylmethyl ester

生成物 1

HCID 22349481(2-Oxo-1,2,4,5-tetrahydroimidazo[1,5,4-de][1,4]benzoxazin-4-yl)methyl 4-methylbenzenesulfonate収率 55.5%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane
溶媒
2 回

実験手順

Toluene-4-sulfonic acid 5-amino-3,4-dihydro-2H-benzo[1,4]oxazin-3-ylmethyl ester (6.7 g , ˜10 mmole) was dissolved in methylene chloride (100 mL), N, N-diisopropylethylamine (5.22 mL, 30.0 mmole) was added, followed by carbonyldiimidazole (4.05 g, 25.0 mmole), and the mixture was stirred at room temperature under nitrogen overnight. The mixture was diluted with methylene chloride (100 mL), washed with water (2×200 mL), saturated sodium bicarbonate (200 mL) saturated sodium chloride (200 mL) and dried (Na2SO4). Filtration, evaporation in vacuum and column chromatography on silica gel with 1% methanol/methylene chloride as eluent gave 2.0 g of the title compound as an off white solid, m.p. 140-142° C. 1H NMR (DMSO-d6): δ 10.7 (s, 1H); 7.63 (d, 2H); 7.47 (d, 2H); 6.82 (t, 1H); 6.57 (d, 1H); 6.52 (d, 1H); 4.53 (m, 1H); 4.43 (dd, 1H); 4.34 (dd, 1H); 4.16 (dd, 1H); 4.10 (dd, 1H); 2.38 (s, 3H). MS (ESI) m/z359 ([M−H]−).

後処理

  1. washwashed with water (2×200 mL), saturated sodium bicarbonate (200 mL) saturated sodium chloride (200 mL)
  2. dry with materialdried (Na2SO4)
  3. filtrationFiltration, evaporation in vacuum and column chromatography on silica gel with 1% methanol/methylene chloride as eluent

出典と根拠

ORDレコード
ord-d15d4f81679e47ef8362b2c741e9cd7b
出典データセット
uspto-grants-2005_07
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US06919334B2

反応ノート

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