Dimethylformamide dimethyl acetal → Ethyl 1-(2,4-difluorophenyl)-7-ethylthio-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate

HRID 232475노트

반응식

HRID 232475 반응식
[F:1][C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[NH:9][C:10]1[N:23]=[C:22]([S:24][CH2:25][CH3:26])[C:21]([F:27])=[CH:20][C:11]=1[C:12]([CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16])=[O:13].[CH3:28]OC(OC)N(C)C>C1C=CC=CC=1>[F:1][C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[N:9]1[C:10]2[C:11](=[CH:20][C:21]([F:27])=[C:22]([S:24][CH2:25][CH3:26])[N:23]=2)[C:12](=[O:13])[C:14]([C:15]([O:17][CH2:18][CH3:19])=[O:16])=[CH:28]1

참가 물질

4

반응물 2

HCID 78373Dimethylformamide dimethyl acetalHCID 13849319Ethyl 2-[2-(2,4-difluorophenylamino)-6-ethylthio-5-fluoronicotinoyl]acetate

생성물 1

HCID 13849337Ethyl 1-(2,4-difluorophenyl)-7-ethylthio-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate수율 70.1%

시약·촉매·용매 1

HCID 241Benzene용매

실험 절차

In 3 ml of benzene was dissolved 160 mg of ethyl 2-[2-(2,4-difluorophenylamino)-6-ethylthio-5-fluoronicotinoyl]acetate, and 72 mg of N,N-dimethylformamide dimethylacetal was added thereto, after which the resulting mixture was subjected to reaction under reflux for 2.5 hours. The solvent was removed by distillation under reduced pressure, and the residue thus obtained was purified by a column chromatography [Wako Silica Gel C-200, eluant: benzene-ethyl acetate (10:1 by volume)] to obtain 115 mg (yield 70.1%) of ethyl 1-(2,4-difluorophenyl)-7-ethylthio-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate having a melting point of 169.5°-171° C.

후처리

  1. additionwas added
  2. customafter which the resulting mixture was subjected to reaction
  3. temperatureunder reflux for 2.5 hours
  4. customThe solvent was removed by distillation under reduced pressure
  5. customthe residue thus obtained
  6. customwas purified by a column chromatography [Wako Silica Gel C-200, eluant: benzene-ethyl acetate (10:1 by volume)]

출처 및 근거

ORD 기록
ord-e64796bc230e4f0a86591f36a2e65ee5
출처 데이터셋
uspto-grants-1989_07
특허 번호
US04851535

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