Aniline → 3-(Phenylamino)butanoic acid

HRID 1604823

반응식

HRID 1604823 반응식
[NH2:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:8]([OH:13])(=[O:12])/[CH:9]=[CH:10]/[CH3:11]>C1(C)C=CC=CC=1>[C:2]1([NH:1][CH:10]([CH3:11])[CH2:9][C:8]([OH:13])=[O:12])[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

참가 물질

4

반응물 2

HCID 6115AnilineHCID 637090Crotonic Acid

생성물 1

HCID 117152833-(Phenylamino)butanoic acid수율 61%

시약·촉매·용매 1

HCID 1140Toluene용매

실험 절차

A mixture of aniline (3.0 g, 32 mmol) and crotonic acid (2.0 g, 23 mmol) in toluene (20 mL) was heated at reflux for 18 h. Removal of solvent and chromatography (silica gel, EtOAc/hexane, 9/1) of the crude material afforded 2.5 g (61%) of 3-phenylaminobutanoic acid. The acid was treated with PPA (20 mL) at 110° C. for 6 h and the reaction mixture was poured into ice water (50 mL) and then was neutralized with Na2CO3 to pH 7. Extraction with EtOAc (3×60 mL) followed by chromatography (silica gel, EtOAc/hexane, 4/6) afforded 1.0 g (44%) of 1,2,3,4-tetrahydro-2-methyl-4-quinolinone (structure 59A of Scheme XLVIII, where R1 =R3 =H, R2 =methyl) as a yellow solid. The quinolinone was treated with di-tert-butyl dicarbonate (2.2 g, 10 mmol) and DMAP (0.84 g, 6.8 mmol) in THF (15 mL) for 16 h followed by chromatography (silica gel, EtOAc/hexane, 2/8) to afford 1.1 g (68%) of 1-tert-butoxycarbonyl-1,2,3,4-tetrahydro-2-methyl-4-quinolinone as a yellow oil. Data for 1-tert-butoxycarbonyl-1,2,3,4-tetrahydro-2-methyl-4-quinolinone: 1H NMR (400 MHz, CDCl3) 7.99 (d, J=7.5, 1 H), 7.78 (d, J=7.5, 1 H), 7.50 (t, J=7.5, 1 H), 7.12 (t, J=7.5, 1 H), 5.10 (m, 1 H), 3.04 (dd, J=17.3, 5.8, 1 H), 2.57 (dd, J=17.3, 1.7, 1 H), 1.56 (s, 9 H), 1.22 (d, J=6.9, 3 H).

후처리

  1. temperaturewas heated
  2. temperatureat reflux for 18 h
  3. customRemoval of solvent and chromatography (silica gel, EtOAc/hexane, 9/1) of the crude material

출처 및 근거

ORD 기록
ord-5dd7e2575aed4a26b45f7c8ef1759ef0
출처 데이터셋
uspto-grants-1999_11
특허 번호
US05994544

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