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Potassium Phosphate, Tribasic → N,N-Di(Boc)-3-ethynyl-5-[4-(isopropylsulfonyl)phenyl]pyrazin-2-amine

HRID 78659
ノート
印刷プレビュー

反応式

HRID 78659 の反応式
Br[C:2]1[N:3]=[C:4]([C:23]#[C:24][Si](C)(C)C)[C:5]([N:8]([C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[C:9](=[O:15])[O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[N:6][CH:7]=1.[CH:29]([S:32]([C:35]1[CH:40]=[CH:39][C:38](B(O)O)=[CH:37][CH:36]=1)(=[O:34])=[O:33])([CH3:31])[CH3:30].[O-]P([O-])([O-])=O.[K+].[K+].[K+].S(S([O-])=O)([O-])(=O)=O.[Na+].[Na+]>CC#N.CC(C)([P](C(C)(C)C)([Pd][P](C(C)(C)C)(C(C)(C)C)C(C)(C)C)C(C)(C)C)C.O.C(OCC)(=O)C>[C:23]([C:4]1[C:5]([N:8]([C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[C:9](=[O:15])[O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[N:6][CH:7]=[C:2]([C:38]2[CH:37]=[CH:36][C:35]([S:32]([CH:29]([CH3:31])[CH3:30])(=[O:34])=[O:33])=[CH:40][CH:39]=2)[N:3]=1)#[CH:24]
参加物実験手順後処理出典と根拠反応ノート

参加物

9

反応物 4

HCID 62657Potassium Phosphate, TribasicHCID 656671Sodium PyrosulfiteHCID 441193274-(Isopropylsulphonyl)benzeneboronic acidHCID 58070279Tert-butyl N-tert-butoxycarbonyl-N-[5-bromo-3-((trimethylsilyl)ethynyl)pyrazin-2-yl]carbamate

生成物 1

HCID 59471983N,N-Di(Boc)-3-ethynyl-5-[4-(isopropylsulfonyl)phenyl]pyrazin-2-amine

試薬・触媒・溶媒

4
HCID 178418851HCID 178418851、化合物触媒HCID 962Water溶媒2 回HCID 6342Acetonitrile溶媒HCID 8857Ethyl Acetate溶媒

実験手順

tert-butyl N-[5-bromo-3-(2-trimethylsilylethynyl)pyrazin-2-yl]-N-tert-butoxycarbonyl-carbamate (3 g, 6.377 mmol) and (4-isopropylsulfonylphenyl)boronic acid (1.491 g, 6.536 mmol) were dissolved in MeCN (60.00 mL) then treated with water (12.00 mL) and K3PO4 (2.706 g, 12.75 mmol) then degassed/flushed nitrogen (×5 cycles). Treated with Pd[P(tBu)3]2 (162.9 mg, 0.3188 mmol) and reflushed Vac/Nitrogen ×5. The resulting mixture was stirred at room temperature for 1 h. The reaction mixture was poured quickly into a mixture of ethyl acetate (500 mL), water (90 mL) and 1% aqueous sodium metabisulphite at 4° C., shaken well and the layer separated. The organic fraction was dried over MgSO4, filtered and the filtrate was treated with 3-mercaptopropyl ethyl sulphide on silica (0.8 mmol/g)(1 g), pre-absorbed onto silica gel then purified by column chromatography on silica gel eluting with 30-40% EtOAc/petroleu ether. Product fractions were combined and concentrated in vacuo to leave the product as a yellow/ brown viscous oil. Triturated with petroleum ether and some diethyl ether and a small amount of dichloromethane added. Left to stand at room temperature for 30 min and beige crystals formed, isolated by filtration to leave the product as a beige solid (1.95 g, 61%); 1H NMR (400 MHz, DMSO) d 1.20 (m, 6H), 1.39 (s, 18H), 3.50 (m, 1H), 5.01 (s, 1H), 8.03 (m, 2H), 8.46 (m, 2H) and 9.37 (s, 1H) ppm.

後処理

  1. stirringshaken well
  2. customthe layer separated
  3. dry with materialThe organic fraction was dried over MgSO4
  4. filtrationfiltered
  5. additionthe filtrate was treated with 3-mercaptopropyl ethyl sulphide on silica (0.8 mmol/g)(1 g)
  6. custompre-absorbed onto silica gel
  7. customthen purified by column chromatography on silica gel eluting with 30-40% EtOAc/petroleu ether
  8. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-28689bb3683e4eb9a18ca90aa27776b8
出典データセット
uspto-grants-2014_09
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08841308B2

反応ノート

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このページの内容参加物実験手順後処理出典と根拠反応ノート