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Ammonium Chloride → 1-(3-Benzyloxy-2,2-difluoropropyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole

HRID 2279881
ノート
印刷プレビュー

反応式

HRID 2279881 の反応式
[CH2:1]([O:8][CH2:9][C:10]([F:19])([F:18])[CH2:11][N:12]1[CH:16]=[C:15](I)[CH:14]=[N:13]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([Mg]Cl)(C)C.CO[B:27]1[O:31][C:30]([CH3:33])([CH3:32])[C:29]([CH3:35])([CH3:34])[O:28]1.[Cl-].[NH4+]>C1COCC1>[CH2:1]([O:8][CH2:9][C:10]([F:19])([F:18])[CH2:11][N:12]1[CH:16]=[C:15]([B:27]2[O:31][C:30]([CH3:33])([CH3:32])[C:29]([CH3:35])([CH3:34])[O:28]2)[CH:14]=[N:13]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

6

反応物 4

HCID 25517Ammonium ChlorideHCID 109757592-Methoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolaneHCID 678137681-(3-benzyloxy-2,2-difluoropropyl)-4-iodo-1H-pyrazole2 回HCID 178418918HCID 178418918、化合物

生成物 1

HCID 678139791-(3-Benzyloxy-2,2-difluoropropyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole収率 736.5%

試薬・触媒・溶媒

1
HCID 8028Tetrahydrofuran溶媒

反応条件

温度
-40 °C

実験手順

A solution of 1-(3-benzyloxy-2,2-difluoropropyl)-4-iodo-1H-pyrazole (Compound 59F, 1.8 g, 4.7 mmol) in THF (40 mL) was cooled to −78° C., treated with iPrMgCl (4.75 mL, 9.5 mmol, 2M) and the temperature was raised to −40° C. After 20 min stirring at −40° C., reaction mixture was cooled to −78° C. and treated with 2-methoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (0.091 mL, 0.56 mmol). The reaction mixture was allowed to warm to RT, treated with sat. aq. ammonium chloride (20 mL) and extracted with ethyl acetate (20 mL). The organic layer was dried over Na2SO4, filtered and concentrated to give 1.56 g (89%) of desired product as an oil. 1H NMR (500 MHz, CDCl3) δ 7.81 (s, 1H), 7.78 (s, 1H), 7.36-7.33 (m, 5H), 4.64-4.59 (m, 4H), 3.56 (t, J=12 Hz, 2H), 1.26 (s, 12H).

後処理

  1. customreaction mixture
  2. temperaturewas cooled to −78° C.
  3. temperatureto warm to RT
  4. extractionextracted with ethyl acetate (20 mL)
  5. dry with materialThe organic layer was dried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated

出典と根拠

ORDレコード
ord-e3e06df473414f14aed961aedc9c9837
出典データセット
uspto-grants-2015_09
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09133224B2

反応ノート

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