Water → 3,5-Difluorobenzylphosphonic acid

HRID 2041836

반응식

HRID 2041836 반응식
[F:1][C:2]1[CH:3]=[C:4]([CH:14]=[C:15]([F:17])[CH:16]=1)[CH2:5][P:6](=[O:13])([O:10]CC)[O:7]CC.Br[Si](C)(C)C.O>ClCCl.CO>[F:17][C:15]1[CH:14]=[C:4]([CH:3]=[C:2]([F:1])[CH:16]=1)[CH2:5][P:6](=[O:7])([OH:13])[OH:10]

참가 물질

6

반응물 3

HCID 962WaterHCID 76113BromotrimethylsilaneHCID 11219261(3,5-Difluoro-benzyl)-phosphonic acid diethyl ester

생성물 1

HCID 667303683,5-Difluorobenzylphosphonic acid수율 91%

시약·촉매·용매 2

HCID 887Methanol용매HCID 6344Dichloromethane용매

실험 절차

Diethyl 3,5-difluorobenzylphosphonate (3.00 g, 11.4 mmol) was dissolved in dry dichloromethane (25 mL). Bromotrimethylsilane (4.9 mL, 37 mmol) was added via syringe. The reaction was capped with a greased glass stopper and allowed to stir for 6 hours. The volatiles were removed under reduced pressure to yield a yellow oil. This was dissolved in 8:1 methanol:water (25 mL) and allowed to stir overnight. After removing the solvents, recrystallization in acetonitrile yielded a white crystalline solid (1.98 g, 91% yield). 1H NMR (400.14 MHz, DMSO) δ 7.05 (dt, J=9.49, 2.09 Hz), 6.95 (d, J=8.54 Hz, 2H), 3.02 (d, J=21.57 Hz, 2H). 31P {1H} NMR (161.97 MHz, DMSO): δ 20.63. Analysis calculated (found) %: C, 40.40 (40.67), H, 3.39 (3.39).

후처리

  1. customThe reaction was capped with a greased glass stopper
  2. customThe volatiles were removed under reduced pressure
  3. customto yield a yellow oil
  4. stirringto stir overnight
  5. customAfter removing
  6. customthe solvents, recrystallization in acetonitrile

출처 및 근거

ORD 기록
ord-d3b825b5d01f40bfbda89b1a55f699fd
출처 데이터셋
uspto-grants-2013_11
특허 번호
US08586208B2

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