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2,2-Dimethyl-propionic acid 5-bromo-3-iodo-pyrazolo[3,4-b]pyridin-1-ylmethyl ester → 2,2-Dimethyl-propionic acid 5-bromo-3-(3-chloro-benzyl)-pyrazolo[3,4-b]pyridin-1-ylmethyl ester

HRID 1865639
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HRID 1865639 반응식
[Br:1][C:2]1[CH:3]=[C:4]2[C:10](I)=[N:9][N:8]([CH2:12][O:13][C:14](=[O:19])[C:15]([CH3:18])([CH3:17])[CH3:16])[C:5]2=[N:6][CH:7]=1.[Cl-].[Cl:21][C:22]1[CH:23]=[C:24]([CH:27]=[CH:28][CH:29]=1)[CH2:25][Zn+]>O1CCCC1>[Br:1][C:2]1[CH:3]=[C:4]2[C:10]([CH2:25][C:24]3[CH:27]=[CH:28][CH:29]=[C:22]([Cl:21])[CH:23]=3)=[N:9][N:8]([CH2:12][O:13][C:14](=[O:19])[C:15]([CH3:18])([CH3:17])[CH3:16])[C:5]2=[N:6][CH:7]=1
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참가 물질

4

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HCID 579757462,2-Dimethyl-propionic acid 5-bromo-3-iodo-pyrazolo[3,4-b]pyridin-1-ylmethyl esterHCID 178478087HCID 178478087, 화합물

생성물 1

HCID 686623032,2-Dimethyl-propionic acid 5-bromo-3-(3-chloro-benzyl)-pyrazolo[3,4-b]pyridin-1-ylmethyl ester수율 30%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

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온도
50 °C

실험 절차

2,2-Dimethyl-propionic acid 5-bromo-3-iodo-pyrazolo[3,4-b]pyridin-1-ylmethyl ester (1.46 g, 3.33 mmol), 3-chlorobenzylzinc chloride (0.5 M in tetrahydrofuran, 6.8 ml, 3.40 mmol), tetrakis(triphenylphoshino)palladium(0) (384 mg, 0.33 mmol), and tetrahydrofuran (10 ml) were combined and stirred for 18 hours at 50° C. The reaction was quenched with saturated, aqueous ammonium chloride, and extracted with dichloromethane. The organic layer was dried over sodium sulfate and concentrated in vacuo. The crude material was purified by flash chromatography (0 to 10% ethyl acetate in hexanes) to give 436 mg (30%) of 2,2-dimethyl-propionic acid 5-bromo-3-(3-chloro-benzyl)-pyrazolo[3,4-b]pyridin-1-ylmethyl ester. 1H-NMR (250 MHz, DMSO-d6) δ 8.56 (s, 1H), 7.88 (s, 1H), 7.24-7.18 (m, 4H), 6.41 (s, 2H), 4.25 (s, 2H), 1.18 (s, 9H); MS: m/z 436.1, 438.1 (M+H+).

후처리

  1. customThe reaction was quenched with saturated, aqueous ammonium chloride
  2. extractionextracted with dichloromethane
  3. dry with materialThe organic layer was dried over sodium sulfate
  4. concentrationconcentrated in vacuo
  5. customThe crude material was purified by flash chromatography (0 to 10% ethyl acetate in hexanes)

출처 및 근거

ORD 기록
ord-2cdde49c236f4befb3c029e154980a0f
출처 데이터셋
uspto-grants-2009_12
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US07626021B2

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