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Triphenylphosphine → 1-(4-tert-butoxyethoxyphenyl)-5-methyl-1H-pyrazole-4-carboxylic acid ethyl ester

HRID 1748560
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HRID 1748560 반응식
[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[N:8][N:9]([C:12]2[CH:17]=[CH:16][C:15]([OH:18])=[CH:14][CH:13]=2)[C:10]=1[CH3:11])=[O:5])[CH3:2].[C:19]([O:23][CH2:24][CH2:25]O)([CH3:22])([CH3:21])[CH3:20].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(OC(N=NC(OC(C)C)=O)=O)(C)C>O1CCCC1.C1(C)C=CC=CC=1.O>[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[N:8][N:9]([C:12]2[CH:13]=[CH:14][C:15]([O:18][CH2:25][CH2:24][O:23][C:19]([CH3:22])([CH3:21])[CH3:20])=[CH:16][CH:17]=2)[C:10]=1[CH3:11])=[O:5])[CH3:2]
참가 물질실험 절차후처리출처 및 근거반응 노트

참가 물질

8

반응물 4

HCID 11776TriphenylphosphineHCID 242322-(Tert-butoxy)ethan-1-olHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 866924241-(4-hydroxyphenyl)-5-methyl-1H-pyrazole-4-carboxylic acid ethyl ester

생성물 1

HCID 897349361-(4-tert-butoxyethoxyphenyl)-5-methyl-1H-pyrazole-4-carboxylic acid ethyl ester수율 123.7%

시약·촉매·용매 3

HCID 962Water용매HCID 1140Toluene용매HCID 8028Tetrahydrofuran용매

실험 절차

To a solution of 1-(4-Hydroxyphenyl)-5-methyl-1H-pyrazole-4-carboxylic acid ethyl ester (500 mg) in Reference Example 39 (2), 2-tert-butoxyethanol (480 mg) and triphenylphosphine (1.06 g) in tetrahydrofuran (20 ml) was added dropwise a solution of 40% azodicarboxylic acid diisopropylester in toluene (2.14 ml) under ice-cooling, and then stirred at room temperature overnight. After completion of the reaction, water was added thereto, extracted with ethyl acetate, the organic layer was dried over anhydrous sodium sulfate, and the solvent was evaporated in vacuo. The obtained residue was purified with silica gel chromatography (n-hexane/ethyl acetate) to give 1-(4-tert-butoxyethoxyphenyl)-5-methyl-1H-pyrazole-4-carboxylic acid ethyl ester (870 mg) as a pale yellow oil.

후처리

  1. temperaturecooling
  2. additionwas added
  3. extractionextracted with ethyl acetate
  4. dry with materialthe organic layer was dried over anhydrous sodium sulfate
  5. customthe solvent was evaporated in vacuo
  6. customThe obtained residue was purified with silica gel chromatography (n-hexane/ethyl acetate)

출처 및 근거

ORD 기록
ord-013471679a6f441082657b4f815af7a3
출처 데이터셋
uspto-grants-2015_10
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US09150555B2

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