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Cesium carbonate → 2-Amino-6-cyclopropylbenzonitrile

HRID 711911
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HRID 711911 반응식
[NH2:1][C:2]1[CH:9]=[CH:8][CH:7]=[C:6](Br)[C:3]=1[C:4]#[N:5].C[C:12]1(C)[CH2:14][CH:13]1B(O)O.C([O-])([O-])=O.[Cs+].[Cs+]>COCCOC.O.C1(P([Pd-4](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)C=CC=CC=1>[NH2:1][C:2]1[CH:9]=[CH:8][CH:7]=[C:6]([CH:12]2[CH2:14][CH2:13]2)[C:3]=1[C:4]#[N:5]
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참가 물질

7

반응물 3

HCID 10796Cesium carbonateHCID 98130382-Amino-6-bromobenzonitrileHCID 57416253(2,2-Dimethylcyclopropyl)boronic acid

생성물 1

HCID 667472522-Amino-6-cyclopropylbenzonitrile수율 40,578.602%

시약·촉매·용매 3

HCID 178420553HCID 178420553, 화합물촉매
HCID 962
Water
용매
HCID 80711,2-Dimethoxyethane용매

실험 절차

To a degazed solution of 2-amino-6-bromobenzonitrile (851 mmol, 168 mg), 2,2-dimethylcyclopropylboronic acid (1.106 μmol, 126 mg) (Example 270b), and Cs2CO3 (2.979 mmol, 970 mg) in DME (3.4 mL) and water (850 μL) was added tetrakis(triphenylphosphino)palladium(0) (43 μmol, 50 mg) under nitrogen and the reaction mixture microwaved for 2 hours at 160° C. The reaction mixture was cooled to room temperature and extracted with EtOAc (3×5 mL). The combined organic layers was washed once with brine (5 mL), dried over sodium sulfate, filtered and evaporated. The crude product was purified on silica gel (EtOAc/hexanes 10%-40%) to give the desired product (71 mg, 45%) as a waxy, yellow solid. 1H NMR (400 MHz, CDCl3) δ 0.82 (m, 1H), 0.82 (s, 3H), 0.85 (m, 1H), 1.33 (s, 3H), 1.92 (m, 1H), 4.36 (br. s, 2H), 6.47 (d, J=8 Hz, 1H), 6.56 (d, J=8 Hz, 1H), 7.20 (t, J=8 Hz, 1H).

후처리

  1. customthe reaction mixture microwaved for 2 hours at 160° C
  2. extractionextracted with EtOAc (3×5 mL)
  3. washThe combined organic layers was washed once with brine (5 mL)
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. customevaporated
  7. customThe crude product was purified on silica gel (EtOAc/hexanes 10%-40%)

출처 및 근거

ORD 기록
ord-50288beee3454672b6da44806fc73313
출처 데이터셋
uspto-grants-2015_11
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US09181276B2

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