Ammonium Chloride → Benzyl {2-[3,5-bis(trifluoromethyl)phenyl]-2-hydroxy-1,1-dimethylethyl}carbamate

HRID 607040ノート

反応式

HRID 607040 の反応式
C([Mg]Br)C.I[C:6]1[CH:11]=[C:10]([C:12]([F:15])([F:14])[F:13])[CH:9]=[C:8]([C:16]([F:19])([F:18])[F:17])[CH:7]=1.[CH3:20][C:21]([NH:25][C:26](=[O:35])[O:27][CH2:28][C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1)([CH3:24])[CH:22]=[O:23].[NH4+].[Cl-]>C1COCC1.O>[F:17][C:16]([F:19])([F:18])[C:8]1[CH:7]=[C:6]([CH:22]([OH:23])[C:21]([NH:25][C:26](=[O:35])[O:27][CH2:28][C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)([CH3:24])[CH3:20])[CH:11]=[C:10]([C:12]([F:15])([F:14])[F:13])[CH:9]=1

参加物

7

反応物 4

HCID 25517Ammonium ChlorideHCID 6309701-Iodo-3,5-bis(trifluoromethyl)benzeneHCID 14578675(1,1-Dimethyl-2-oxoethyl)carbamic acid benzyl esterHCID 178418443HCID 178418443、化合物

生成物 1

HCID 53363830Benzyl {2-[3,5-bis(trifluoromethyl)phenyl]-2-hydroxy-1,1-dimethylethyl}carbamate

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 8028Tetrahydrofuran溶媒2 回

実験手順

Ethylmagnesium bromide (1.63 mL, 1M in THF, 1.63 mmol) was added dropwise to a stirred solution of 1-iodo-3,5-bis(trifluoromethyl)benzene (608 mg, 317 μL, 1.79 mmol) in dry THF (1 mL) at room temperature under N2 and the reaction was stirred for 30 min. The resulting solution was added to a stirred solution of benzyl (1,1-dimethyl-2-oxoethyl)carbamate (163.5 mg, 0.739 mmol) in dry THF (1 mL) at −20° C. and reaction was allowed to warn to room temperature over 3 h. Saturated NH4Cl (10 mL) and water (10 mL) were added and the mixture was extracted with EtOAc (3×20 mL). The combined extracts were dried (Na2SO4) and concentrated in vacuo to give the crude product. This was purified by flash chromatography (Si, 25×160 mm, 0-40% EtOAc in hexanes gradient) to afford benzyl {2-[3,5-bis(trifluoromethyl)phenyl]-2-hydroxy-1,1-dimethylethyl}carbamate. Rf=0.40 (20% EtOAc in hexanes). LCMS calc.=436.1; found=436.0 (M+1)+. 1H NMR (600 MHz, CDCl3) δ 7.80 (s, 1H), 7.77 (s, 2H), 7.39-7.33 (m, 5H), 5.12-5.08 (m, 2H), 1.36 (s, 1H), 4.90 (d, J=4.4 Hz, 1H), 4.81 (s, 1H), 1.36 (s, 3H), 1.23 (s, 3H).

後処理

  1. customreaction
  2. waitto warn to room temperature over 3 h
  3. extractionthe mixture was extracted with EtOAc (3×20 mL)
  4. dry with materialThe combined extracts were dried (Na2SO4)
  5. concentrationconcentrated in vacuo
  6. customto give the crude product
  7. customThis was purified by flash chromatography (Si, 25×160 mm, 0-40% EtOAc in hexanes gradient)

出典と根拠

ORDレコード
ord-7ac17aab30434b40a3ad17defd6eb4c0
出典データセット
uspto-grants-2011_03
特許番号
US07915271B2

反応ノート

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