Sodium Carbonate → 2-methylpropan-2-yl 4-[4-nitro-3-(propan-2-yloxy)phenyl]-3,6-dihydropyridine-1(2H)-carboxylate

HRID 518810ノート

反応式

HRID 518810 の反応式
Br[C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[C:4]([O:11][CH:12]([CH3:14])[CH3:13])[CH:3]=1.CC1(C)C(C)(C)OB([C:23]2[CH2:24][CH2:25][N:26]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH2:27][CH:28]=2)O1.C(=O)([O-])[O-].[Na+].[Na+]>O1CCOCC1.O.C(OCC)(=O)C.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>[N+:8]([C:5]1[CH:6]=[CH:7][C:2]([C:23]2[CH2:28][CH2:27][N:26]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH2:25][CH:24]=2)=[CH:3][C:4]=1[O:11][CH:12]([CH3:14])[CH3:13])([O-:10])=[O:9]

参加物

8

反応物 3

HCID 10340Sodium CarbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 226243214-Bromo-2-isopropoxy-1-nitro-benzene

生成物 1

HCID 866979812-methylpropan-2-yl 4-[4-nitro-3-(propan-2-yloxy)phenyl]-3,6-dihydropyridine-1(2H)-carboxylate収率 64.9%

試薬・触媒・溶媒 4

HCID 178418476HCID 178418476、化合物触媒HCID 962Water溶媒HCID 8857Ethyl Acetate溶媒HCID 312751,4-Dioxane溶媒

実験手順

A mixture of 3.26 g of 4-bromo-1-nitro-2-(propan-2-yloxy)benzene, 4.65 g of 2-methylpropan-2-yl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydropyridine-1(2H)-carboxylate, 12.5 ml of a 3M solution of sodium carbonate and 350 mg of bis(triphenylphosphine)dichloropalladium(II) in 41 ml of dioxane is refluxed for 1 h 30. The mixture is diluted with 150 ml of water and 200 ml of ethyl acetate. The aqueous phase is extracted three times with 200 ml of ethyl acetate. The combined organic phases are washed with 100 ml of a saturated sodium chloride solution, dried over magnesium sulfate and concentrated under vacuum. The residue is purified on 600 g of silica, elution being carried out with dichloromethane/ethyl acetate (99/1), so as to give 2.95 g of 2-methylpropan-2-yl 4-[4-nitro-3-(propan-2-yloxy)phenyl]-3,6-dihydropyridine-1(2H)-carboxylate in the form of a yellow solid.

後処理

  1. temperatureis refluxed for 1 h 30
  2. extractionThe aqueous phase is extracted three times with 200 ml of ethyl acetate
  3. washThe combined organic phases are washed with 100 ml of a saturated sodium chloride solution
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated under vacuum
  6. customThe residue is purified on 600 g of silica, elution

出典と根拠

ORDレコード
ord-2c6f871453dc483c9682be8b3badfe1a
出典データセット
uspto-grants-2015_08
特許番号
US09115140B2

反応ノート

読み込み中…