Potassium Carbonate → 6-Fluoro-4-[3-(1,1,2,2-tetrafluoro-ethoxy)-benzyl]-2-trifluoromethyl-3,4-dihydro-2H-benzo[1,4]oxazine

HRID 991350ノート

反応式

HRID 991350 の反応式
F[C:2]1[CH:7]=[CH:6][C:5]([F:8])=[CH:4][C:3]=1[N:9]([CH2:17][C:18]1[CH:23]=[CH:22][CH:21]=[C:20]([O:24][C:25]([F:30])([F:29])[CH:26]([F:28])[F:27])[CH:19]=1)[CH2:10][CH:11]([OH:16])[C:12]([F:15])([F:14])[F:13].C([O-])([O-])=O.[K+].[K+]>CN(C)C=O.O>[F:8][C:5]1[CH:6]=[CH:7][C:2]2[O:16][CH:11]([C:12]([F:13])([F:14])[F:15])[CH2:10][N:9]([CH2:17][C:18]3[CH:23]=[CH:22][CH:21]=[C:20]([O:24][C:25]([F:29])([F:30])[CH:26]([F:27])[F:28])[CH:19]=3)[C:3]=2[CH:4]=1

参加物

5

反応物 2

HCID 11430Potassium CarbonateHCID 235060713-[(2,5-Difluorophenyl)[[3-(1,1,2,2-tetrafluoro-ethoxy)phenyl]methyl]amino]-1,1,1-trifluoro-2-propanol

生成物 1

HCID 108952136-Fluoro-4-[3-(1,1,2,2-tetrafluoro-ethoxy)-benzyl]-2-trifluoromethyl-3,4-dihydro-2H-benzo[1,4]oxazine収率 48%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 6228Dimethylformamide溶媒

反応条件

温度
145 °C

実験手順

The 3-[(2,5-difluorophenyl)[[3-(1,1,2,2-tetrafluoroethoxy)phenyl]methyl]amino]-1,1,1-trifluoro-2-propanol (200 mg, 0.45 mmol) product from EX-661B was dissolved in anhydrous dimethylformamide (20 mL), and powdered K2CO3 (180 mg) was added. The mixture was stirred and heated to 145° C. for 15 h. The mixture was diluted with water (60 mL) and extracted into ether (2×40 mL), which was washed with brine and water. The ether solution was dried over anhydrous MgSO4, and the ether was removed in vacuo. The crude product was purified by flash column chromatography on silica gel eluting with ethyl acetate in hexane (1:15) to give 86.9 mg (48%) of the desired 6-fluoro-3,4-dihydro-4-[[3-(1,1,2,2-tetrafluoroethoxy)phenyl]methyl]-2-(tri-fluoromethyl)-2H-1,4-benzoxazine product as a yellow oil, 98% pure by HPLC analysis. 1H NMR (CDCl3) δ 7.39 (t, 1H), 7.17 (m. 3H), 6.88 (m 1H), 6.41 (m, 2H), 5.92 (tt, 1H), 4.54 (m, 1H), 4.45 (s, 2H), 3.44 (m, 2H). 19F NMR (CDCl3) δ −77.7 (d, 3F), −88.6 (m, 2F), −120.28 (m, 1F), −137.2 (dt, 2F). HRMS calcd. for C18H13F8NO2: 428.0899 [M+H]+, found: 428.0910.

後処理

  1. extractionextracted into ether (2×40 mL), which
  2. washwas washed with brine and water
  3. dry with materialThe ether solution was dried over anhydrous MgSO4
  4. customthe ether was removed in vacuo
  5. customThe crude product was purified by flash column chromatography on silica gel eluting with ethyl acetate in hexane (1:15)

出典と根拠

ORDレコード
ord-ff69a47219a6401a836a0184c9b516c4
出典データセット
uspto-grants-2002_10
特許番号
US06462092B1

反応ノート

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