Sodium Carbonate → HCID 22324115、化合物

HRID 496100ノート

反応式

HRID 496100 の反応式
Br[C:2]1[CH:7]=[CH:6][C:5]([S:8]([NH2:11])(=[O:10])=[O:9])=[C:4]([NH2:12])[CH:3]=1.C(B(CC)[C:16]1[CH:17]=[N:18][CH:19]=[CH:20][CH:21]=1)C.C([O-])([O-])=O.[Na+].[Na+]>COCCOC.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[NH2:12][C:4]1[CH:3]=[C:2]([C:16]2[CH:17]=[N:18][CH:19]=[CH:20][CH:21]=2)[CH:7]=[CH:6][C:5]=1[S:8]([NH2:11])(=[O:10])=[O:9]

参加物

6

反応物 3

HCID 10340Sodium CarbonateHCID 6428513-(Diethylboryl)pyridineHCID 1245249554734-81-5

生成物 1

HCID 22324115HCID 22324115、化合物収率 96.3%

試薬・触媒・溶媒 2

HCID 178418476HCID 178418476、化合物触媒HCID 80711,2-Dimethoxyethane溶媒

実験手順

A mixture of 4-bromo-2-aminobenzenesulfonamide (250 mg, 1.0 mmol), diethyl-3-pyridylborane (225 mg, 1.5 mmol), Pd(PPh3)2Cl2 (35 mg, 5 mol %) in 1,2-dimethoxyethane 30 ml) and Na2CO3 (2M, 3 ml, 6 mmol) were refluxed under N2 for 4 h. The solvents were removed under reduced pressure and the residue was treated with saturated NaHCO3 (20 ml) and extracted with EtOAc (2×40 ml). The organic layer was washed with brine (20 ml), dried (Na2SO4) and the solvent was removed under reduced pressure. The product was purified by flash chromatography on SiO2 using EtOAc:n-hexane (1:1, v/v) as eluent, yielding 240 mg (96%) of 2-amino-4-(3-pyridyl)-benzenesulfonamide as colorless powder. The product was further transformed by Method G (using cyclohexanecarboxaldehyde). M.p. 240-243° C.

後処理

  1. temperaturewere refluxed under N2 for 4 h
  2. customThe solvents were removed under reduced pressure
  3. additionthe residue was treated with saturated NaHCO3 (20 ml)
  4. extractionextracted with EtOAc (2×40 ml)
  5. washThe organic layer was washed with brine (20 ml)
  6. dry with materialdried (Na2SO4)
  7. customthe solvent was removed under reduced pressure
  8. customThe product was purified by flash chromatography on SiO2

出典と根拠

ORDレコード
ord-090fe85ac1c5452db282e3fb674167eb
出典データセット
uspto-grants-2005_09
特許番号
US06943159B1

反応ノート

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