m-Chloroperbenzoic acid → [(S)-2-((R)-8-Hydroxymethyl-7,8-dihydro-[1,4]dioxino[2,3-g]indazol-1-yl)-1-methyl-ethyl]-carbamic acid benzyl ester

HRID 31364ノート

反応式

HRID 31364 の反応式
[CH2:1]([O:8][C:9](=[O:30])[NH:10][C@@H:11]([CH3:29])[CH2:12][N:13]1[C:21]2[C:16](=[CH:17][CH:18]=[C:19]([O:24][CH2:25][C@@H:26]3C[O:27]3)[C:20]=2C=O)[CH:15]=[N:14]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.ClC1C=CC=C([C:38](OO)=[O:39])C=1.CC(C)=O.ClCCl>ClCCl>[CH2:1]([O:8][C:9](=[O:30])[NH:10][C@@H:11]([CH3:29])[CH2:12][N:13]1[C:21]2[C:16](=[CH:17][CH:18]=[C:19]3[O:24][CH2:25][C@@H:26]([CH2:38][OH:39])[O:27][C:20]3=2)[CH:15]=[N:14]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

参加物

5

反応物 3

HCID 70297m-Chloroperbenzoic acidHCID 21584124Propan-2-one--dichloromethane (1/1)HCID 86605340HCID 86605340、化合物

生成物 1

HCID 69253308[(S)-2-((R)-8-Hydroxymethyl-7,8-dihydro-[1,4]dioxino[2,3-g]indazol-1-yl)-1-methyl-ethyl]-carbamic acid benzyl ester収率 60%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

To a stirred solution of the epoxide from Step A (0.86 g, 2.10 mmol) in dichloromethane (100 mL) was added m-chloroperbenzoic acid (70%, 0.62 g, 2.52 mmol) in portions under nitrogen atmosphere. After the addition completed the reaction mixture was stirred overnight. The reaction was quenched by a saturated aqueous solution of sodium thiosulfate (20 mL) and dichloromethane was evaporated. To the aqueous residue was added potassium carbonate (1.0 g) and methanol (200 mL), the resulting mixture was stirred for ½ h and organic solvent was evaporated. The residue was extracted with ethyl acetate (50 mL×3), dried and evaporated to dryness to afford an oil. Chromatography on silica eluting with a gradient of 0% to 10% acetone/dichloromethane gave an oil (0.50 g, 60%). LCMS (+APCI) m/z 397 (M+H), 1H NMR (600 MHz, CDCl3) δ 7.82 (s, 1H), 7.33-7.13 (m, 5H), 7.14 (d, J=8.4 Hz, 1H), 6.74 (d, J=8.4 Hz, 1H), 5.04-4.97 (m, 3H), 4.65 (ddd, J=6.6, 13.4, 51.6 Hz, 2H), 4.32 (m, 3H), 4.08 (m, 2H), 3.91 (m, 2H), 1.18(d, J=7.2 Hz, 3H).

後処理

  1. additionAfter the addition
  2. customThe reaction was quenched by a saturated aqueous solution of sodium thiosulfate (20 mL) and dichloromethane
  3. customwas evaporated
  4. additionTo the aqueous residue was added potassium carbonate (1.0 g) and methanol (200 mL)
  5. stirringthe resulting mixture was stirred for ½ h
  6. customorganic solvent was evaporated
  7. extractionThe residue was extracted with ethyl acetate (50 mL×3)
  8. customdried
  9. customevaporated to dryness
  10. customto afford an oil

出典と根拠

ORDレコード
ord-943c211582a540b09768b8a508341c3e
出典データセット
uspto-grants-2008_09
特許番号
US07425572B2

反応ノート

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