Dimethylformamide → 8-(2-Pyridin-2-yl-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)-[1,6]naphthyridine

HRID 751315노트

반응식

HRID 751315 반응식
Br[C:2]1[CH:3]=[N:4][CH:5]=[C:6]2[C:11]=1[N:10]=[CH:9][CH:8]=[CH:7]2.[N:12]1[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=1[C:18]1[C:19](B(O)O)=[C:20]2[CH2:25][CH2:24][CH2:23][N:21]2[N:22]=1.P([O-])([O-])([O-])=O.[K+].[K+].[K+].CN(C=O)C>O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[N:12]1[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=1[C:18]1[C:19]([C:2]2[CH:3]=[N:4][CH:5]=[C:6]3[C:11]=2[N:10]=[CH:9][CH:8]=[CH:7]3)=[C:20]2[CH2:25][CH2:24][CH2:23][N:21]2[N:22]=1

참가 물질

7

반응물 4

HCID 6228DimethylformamideHCID 62657Potassium Phosphate, TribasicHCID 8172708-Bromo-1,6-naphthyridineHCID 59710031(2-pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazole-3-boronic acid

생성물 1

HCID 586119458-(2-Pyridin-2-yl-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)-[1,6]naphthyridine수율 65.1%

시약·촉매·용매 2

HCID 178418397HCID 178418397, 화합물촉매HCID 962Water용매2회

반응 조건

온도
60 °C

실험 절차

Add 8-bromo-[1,6]naphthyridine (Spec; 32 mg, 0.152 mmol), 2-(pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazole-3-boronic acid (Preparation 5; 35 mg, 0.153 mmol), and potasium phosphate (97 mg, 0.458 mmol) to DMF (1 mL) and water (0.5 mL). De-gas the solution with argon and add tetrakis(triphenylphosphine)palladium(0) (88 mg, 0.076 mol). Heat the mixture at 60° C. for 18 h under an argon atmosphere. Cool the mixture to room temperature and dilute with water. Filter the mixture, and separate the filtrate. Extract the aqueous layer with dichloromethane. Dry the combined organic layers over sodium sulfate, filter, and concentrate. Purify the crude residue by column chromatography (12 g Redisep column, gradient dichloromethane through CMA over 40 min, 20 mL/min) to provide the title compound (31 mg, 64%) as an off white solid. Mp 180-184° C. MS (APCI) m/e=314 (M+1). 1H NMR (CDCl3) δ 8.88 (dd, J=1.6, 4.2 Hz, 1H), 8.60 (d, J=4.7 Hz, 1H), 8.28 (d, J=8.5 Hz, 1H), 8.19 (d, J=8.9 Hz, 1H), 7.73-7.68 (m, 3H), 7.58 (dd, J=4.2, 8.5 Hz, 2H), 4.30 (t, J=7 Hz, 2H), 3.30 (t, J=7 Hz, 2H), 2.73 (p, J=7 Hz, 2H). HPLC: >99%, Rt=7.1 min.

후처리

  1. customDe-gas the solution with argon
  2. temperatureCool the mixture to room temperature
  3. filtrationFilter the mixture
  4. customseparate the filtrate
  5. extractionExtract the aqueous layer with dichloromethane
  6. dry with materialDry the combined organic layers over sodium sulfate
  7. filtrationfilter
  8. concentrationconcentrate
  9. customPurify the crude residue by column chromatography (12 g Redisep column, gradient dichloromethane through CMA over 40 min, 20 mL/min)

출처 및 근거

ORD 기록
ord-c2784340ab4c483da4f3f6ac10012af5
출처 데이터셋
uspto-grants-2008_07
특허 번호
US07405299B2

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