Ethyl diazoacetate → (3-Trifluoromethylbenzyloxy)acetic Acid Ethyl Ester

HRID 18804

반응식

HRID 18804 반응식
[F:1][C:2]([F:12])([F:11])[C:3]1[CH:4]=[C:5]([CH:8]=[CH:9][CH:10]=1)[CH2:6][OH:7].[N+](=[CH:15][C:16]([O:18][CH2:19][CH3:20])=[O:17])=[N-]>ClCCl.CCCCCCC.CC(O)=O.CC(O)=O.CC(O)=O.CC(O)=O.[Rh].[Rh]>[CH2:19]([O:18][C:16](=[O:17])[CH2:15][O:7][CH2:6][C:5]1[CH:8]=[CH:9][CH:10]=[C:3]([C:2]([F:11])([F:12])[F:1])[CH:4]=1)[CH3:20]

참가 물질

6

반응물 2

HCID 12192Ethyl diazoacetateHCID 676813-(Trifluoromethyl)benzylic alcohol

생성물 1

HCID 68572230(3-Trifluoromethylbenzyloxy)acetic Acid Ethyl Ester수율 97.9%

시약·촉매·용매 3

HCID 423677Acetic acid, rhodium salt (4:2)촉매HCID 6344Dichloromethane용매HCID 8900Heptane용매

실험 절차

To a solution of 3-trifluoromethylbenzyl alcohol (1.62 g, 10.0 mmol) in dichloromethane (20 mL) is added rhodium (II) acetate dimer (10 mg) followed by ethyl diazoacetate (0.95 mL, 9.0 mmol). The reaction mixture is stirred at RT for 30 min. The reaction mixture is diluted with heptane, filtered through Celite, and the filtrate is evaporated and the residue is vacuum distilled at 150° C. to give 2.31 g of the product 394. 1H NMR (CDCl3) δ 7.65 (bs, 1H), 7.57 (m, 2H), 7.48 (t, 1H), 4.69 (s, 2H), 4.24 (q, 2H), 4.14 (s, 2H), 1.30 (t, 3H); MS: m/z 263 (M+).

후처리

  1. filtrationfiltered through Celite
  2. customthe filtrate is evaporated
  3. distillationdistilled at 150° C.

출처 및 근거

ORD 기록
ord-4849db3f64cf446ca8fa05063e74d175
출처 데이터셋
uspto-grants-2010_06
특허 번호
US07741493B2

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