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

HRID 45881

反応式

HRID 45881 の反応式
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

参加物

6

反応物 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

生成物 1

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

試薬・触媒・溶媒 1

HCID 1140Toluene溶媒

実験手順

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.

後処理

  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%)

出典と根拠

ORDレコード
ord-5f23f624a9664334bdcb0009609d220e
出典データセット
uspto-grants-2013_09
特許番号
US08541575B2

関連ノート

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