Triethylamine → 1-(4-methoxybenzyl)-3-(3-nitrophenyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole

HRID 45881

Reaktionsgleichung

Reaktionsgleichung von HRID 45881
I[C:2]1[C:3]([C:16]2[CH:21]=[CH:20][CH:19]=[C:18]([N+:22]([O-:24])=[O:23])[CH:17]=2)=[N:4][N:5]([CH2:7][C:8]2[CH:13]=[CH:12][C:11]([O:14][CH3:15])=[CH:10][CH:9]=2)[CH:6]=1.[CH3:25][C:26]1([CH3:33])[C:30]([CH3:32])([CH3:31])[O:29][BH:28][O:27]1.COC1C=CC=C(OC)C=1C1C=CC=CC=1P(C1CCCCC1)C1CCCCC1.C(N(CC)CC)C>C1(C)C=CC=CC=1>[CH3:15][O:14][C:11]1[CH:12]=[CH:13][C:8]([CH2:7][N:5]2[CH:6]=[C:2]([B:28]3[O:29][C:30]([CH3:32])([CH3:31])[C:26]([CH3:33])([CH3:25])[O:27]3)[C:3]([C:16]3[CH:21]=[CH:20][CH:19]=[C:18]([N+:22]([O-:24])=[O:23])[CH:17]=3)=[N:4]2)=[CH:9][CH:10]=1

Komponenten

6

Edukt 4

HCID 8471TriethylamineHCID 27347684,4,5,5-Tetramethyl[1,3,2]dioxaborolaneHCID 112698722-Dicyclohexylphosphino-2',6'-dimethoxybiphenylHCID 671844834-iodo-1-(4-methoxybenzyl)-3-(3-nitrophenyl)-1H-pyrazole

Produkt 1

HCID 671842181-(4-methoxybenzyl)-3-(3-nitrophenyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleAusbeute 80 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Versuchsvorschrift

1 g (2.3 mmol) of 4-iodo-1-(4-methoxybenzyl)-3-(3-nitrophenyl)-1H-pyrazole (prepared as described in Example 27) was dissolved in 20 ml of dry toluene and 3.18 ml of 4,4,5,5-tetramethyl-1,3,2-dioxaborolane (23 mmol), 20 mg (0.08 mmol) of palladium(II) chloride diacetonitrile complex, 80 mg (0.005 mmol) of S-Phos (2-dicyclohexylphosphino-2′,6′-dimethoxy-1,1′-biphenyl) and 774 μl (5.7 mmol) of triethylamine were added successively. The reaction mixture was submitted to microwave irradiation in a sealed vial at 90° C. for 30 minutes. The mixture was then filtered through a celite pad and the filtrate evaporated in vacuo. The residue was taken up with dichloromethane and washed with water and the organic layer dried over sodium sulphate and evaporated again. The crude was finally purified by flash-chromatography on a silica gel column (CH2Cl2-CH3COCH3 1%), affording 800 mg (80%) of the title compound, crystallized from diethylether.

Aufarbeitung

  1. customirradiation in a sealed vial at 90° C. for 30 minutes
  2. filtrationThe mixture was then filtered through a celite pad
  3. customthe filtrate evaporated in vacuo
  4. washwashed with water
  5. dry with materialthe organic layer dried over sodium sulphate
  6. customevaporated again
  7. customThe crude was finally purified by flash-chromatography on a silica gel column (CH2Cl2-CH3COCH3 1%)

Quellen und Nachweise

ORD-Eintrag
ord-5f23f624a9664334bdcb0009609d220e
Quelldatensatz
uspto-grants-2013_09
Patentnummer
US08541575B2

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