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Cesium carbonate → tert-Butyl methyl(1-(5-(thiophen-2-yl)tetrazolo[1,5-a]pyrazin-8-yl)azetidin-3-yl)carbamate

HRID 1045739
ノート
印刷プレビュー

反応式

HRID 1045739 の反応式
Br[C:2]1[N:7]2[N:8]=[N:9][N:10]=[C:6]2[C:5]([N:11]2[CH2:14][CH:13]([N:15]([CH3:23])[C:16](=[O:22])[O:17][C:18]([CH3:21])([CH3:20])[CH3:19])[CH2:12]2)=[N:4][CH:3]=1.[S:24]1[CH:28]=[CH:27][CH:26]=[C:25]1B(O)O.C([O-])([O-])=O.[Cs+].[Cs+].O1CCOCC1>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.O>[CH3:23][N:15]([CH:13]1[CH2:14][N:11]([C:5]2[C:6]3[N:7]([N:8]=[N:9][N:10]=3)[C:2]([C:25]3[S:24][CH:28]=[CH:27][CH:26]=3)=[CH:3][N:4]=2)[CH2:12]1)[C:16](=[O:22])[O:17][C:18]([CH3:21])([CH3:20])[CH3:19]
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

7

反応物 4

HCID 10796Cesium carbonateHCID 312751,4-DioxaneHCID 27339602-Thiopheneboronic acidHCID 58447038tert-Butyl (1-(5-bromotetrazolo[1,5-a]pyrazin-8-yl)azetidin-3-yl)(methyl)carbamate

生成物 1

HCID 58447026tert-Butyl methyl(1-(5-(thiophen-2-yl)tetrazolo[1,5-a]pyrazin-8-yl)azetidin-3-yl)carbamate収率 70%

試薬・触媒・溶媒 2

HCID 178418397HCID 178418397、化合物触媒
HCID 962Water溶媒

反応条件

温度
80 °C

実験手順

A 3 L round bottom flask was charged with tert-butyl (1-(5-bromotetrazolo[1,5-a]pyrazin-8-yl)azetidin-3-yl)(methyl)carbamate (50 g, 0.13 mol), thiophene-2-boronic acid (22 g, 0.17 mol), tetrakis(triphenylphosphine)palladium(0) (5.0 g, 4.3 mmol), Cs2CO3 (50 g, 0.15 mol), 1,4-dioxane (1.5 L) and water (500 mL). After the air was purged by bubbling N2 into the solution, the resulting solution was stirred at 80° C. under N2 for 14 h. Work-up: the reaction mixture was concentrated in vacuo. The residue was purified by flash column chromatography on silica gel with 0-25% ethyl acetate in CH2Cl2, and then crystallized from methanol, to afford 35 g (70%) of the product as a yellow solid.

後処理

  1. customAfter the air was purged
  2. customby bubbling N2 into the solution
  3. concentrationthe reaction mixture was concentrated in vacuo
  4. customThe residue was purified by flash column chromatography on silica gel with 0-25% ethyl acetate in CH2Cl2
  5. customcrystallized from methanol

出典と根拠

ORDレコード
ord-bfff2656869743589b853ed32ac178cd
出典データセット
uspto-grants-2013_10
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08569300B2

反応ノート

読み込み中…

このページの内容参加物反応条件実験手順後処理出典と根拠反応ノート