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Hydrochloric Acid → 7-Trifluoromethyl-5-(4-trifluoromethyl-phenyl)-pyrazolo[1,5-a]pyridine-3-carboxylic acid

HRID 269039
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HRID 269039 반응식
C([O:3][C:4]([C:6]1[CH:7]=[N:8][N:9]2[C:14]([C:15]([F:18])([F:17])[F:16])=[CH:13][C:12]([C:19]3[CH:24]=[CH:23][C:22]([C:25]([F:28])([F:27])[F:26])=[CH:21][CH:20]=3)=[CH:11][C:10]=12)=[O:5])C.O[Li].O.Cl>C1COCC1.CO.O>[F:18][C:15]([F:16])([F:17])[C:14]1[N:9]2[N:8]=[CH:7][C:6]([C:4]([OH:5])=[O:3])=[C:10]2[CH:11]=[C:12]([C:19]2[CH:20]=[CH:21][C:22]([C:25]([F:26])([F:27])[F:28])=[CH:23][CH:24]=2)[CH:13]=1
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참가 물질

7

반응물 3

HCID 313Hydrochloric AcidHCID 168937Lithium hydroxide, monohydrateHCID 866080137-Trifluoromethyl-5-(4-trifluoromethyl-phenyl)-pyrazolo[1,5-a]pyridine-3-carboxylic acid ethyl ester

생성물 1

HCID 866080157-Trifluoromethyl-5-(4-trifluoromethyl-phenyl)-pyrazolo[1,5-a]pyridine-3-carboxylic acid수율 96.2%

시약·촉매·용매 3

HCID 887
Methanol
용매
HCID 962Water용매
HCID 8028Tetrahydrofuran용매

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온도
23 °C

실험 절차

To a solution of 7-trifluoromethyl-5-(4-trifluoromethyl-phenyl)-pyrazolo[1,5-a]pyridine-3-carboxylic acid ethyl ester (example C.22 step 7) (1.21 g, 3.0 mmol) in THF (15 mL), MeOH (1.8 mL) and H2O (4.8 mL) was added LiOH.H2O (0.3.8 g, 9.0 mmol) and the reaction mixture was stirred at 23° C. for 18 h. Poured into ice water, adjusted with 1 N HCl to pH 2-3, filtered the precipitate off, washed with H2O and dried at HV to give the title compound as an off-white solid (1.08 g, 96%). MS (ISN) 373 [(M−H)−]; mp >250° C.

후처리

  1. filtrationfiltered the precipitate off,
  2. washwashed with H2O
  3. customdried at HV

출처 및 근거

ORD 기록
ord-86b068f29c9c4c95a9f3c25a0bacd4b1
출처 데이터셋
uspto-grants-2008_11
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US07446113B2

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