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

HRID 518810노트

반응식

HRID 518810 반응식
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]

참가 물질

8

반응물 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

생성물 1

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

시약·촉매·용매 4

HCID 178418476HCID 178418476, 화합물촉매HCID 962Water용매HCID 8857Ethyl Acetate용매HCID 312751,4-Dioxane용매

실험 절차

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.

후처리

  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

출처 및 근거

ORD 기록
ord-2c6f871453dc483c9682be8b3badfe1a
출처 데이터셋
uspto-grants-2015_08
특허 번호
US09115140B2

반응 노트

불러오는 중…