Ethyl Acetate → 5-Chloro-6'-(cyclohexyloxy)-3,3'-bipyridin-2-amine

HRID 1405752

反応式

HRID 1405752 の反応式
Br[C:2]1[C:3]([NH2:9])=[N:4][CH:5]=[C:6]([Cl:8])[CH:7]=1.[CH:10]1([O:16][C:17]2[N:22]=[CH:21][C:20](B(O)O)=[CH:19][CH:18]=2)[CH2:15][CH2:14][CH2:13][CH2:12][CH2:11]1.C(=O)([O-])[O-].[Na+].[Na+].CCOC(C)=O>COCCOC.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[Cl:8][C:6]1[CH:7]=[C:2]([C:20]2[CH:21]=[N:22][C:17]([O:16][CH:10]3[CH2:15][CH2:14][CH2:13][CH2:12][CH2:11]3)=[CH:18][CH:19]=2)[C:3]([NH2:9])=[N:4][CH:5]=1

参加物

8

反応物 4

HCID 8857Ethyl AcetateHCID 10340Sodium CarbonateHCID 27639713-Bromo-5-chloropyridin-2-amineHCID 66747855B-[6-(cyclohexyloxy)-3-pyridinyl]Boronic acid

生成物 1

HCID 667489945-Chloro-6'-(cyclohexyloxy)-3,3'-bipyridin-2-amine収率 90.3%

試薬・触媒・溶媒 3

HCID 178418397HCID 178418397、化合物触媒HCID 962Water溶媒2 回HCID 80711,2-Dimethoxyethane溶媒

反応条件

温度
100 °C

実験手順

n-Butyllithium (1.6 M in hexane) (20.5 mL) was dropwised to a mixture of 5-bromo-2-(cyclohexyloxy)pyridine (7.00 g) and THF (dry) (75 mL) at −78° C. and the mixture was stirred at the same temperature under nitrogen for 40 min. Triisopropyl borate (7.71 g) was dropwised to the mixture at −78° C. and the mixture was stirred at the same temperature for 5 min. Then the mixture was warmed up to room temperature and stirred for additional 30 min. The mixture was poured into 1N NaOH aq. (75 mL)/water (120 mL) and stirred for 1 hr. The organic layer was separated and the aqueous phase was washed with Et2O (100 mL×2) and neutralized by 1N HCl aq. The mixture was extracted with EtOAc, dried over anhydrous sodium sulfate and concentrated in vacuo to give [6-(cyclohexyloxy)pyridin-3-yl]boronic acid (5.15 g) as pale yellow solid. Tetrakis(triphenylphosphine)palladium(0) (107 mg) was added to a suspension of 3-bromo-5-chloropyridin-2-amine (640 mg), [6-(cyclohexyloxy)pyridin-3-yl]boronic acid (750 mg) and sodium carbonate (654 mg) in DME (15 mL) and water (3 mL) and the mixture was stirred at 100° C. under nitrogen for 2.5 hr. Water and EtOAc were added and the organic layer was separated, washed with brine, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by column chromatography (silica gel, eluted with EtOAc in hexane) to give the title compound (846 mg) as colorless gum.

後処理

  1. customthe organic layer was separated
  2. washwashed with brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by column chromatography (silica gel, eluted with EtOAc in hexane)

出典と根拠

ORDレコード
ord-fa2f52714c6d41bfa9686f15b25c7d1e
出典データセット
uspto-grants-2014_12
特許番号
US08916551B2

関連ノート

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