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Pyridine → methyl (1aRS,7bSR)-5-(2-bromo-4-fluorobenzenesulfonylamino)-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylate

HRID 927929
ノート
印刷プレビュー

反応式

HRID 927929 の反応式
[NH2:1][C:2]1[C:11]([C:12]([O:14][CH3:15])=[O:13])=[C:10]2[C:5]([CH:6]3[CH2:16][CH:7]3[CH2:8][O:9]2)=[CH:4][CH:3]=1.N1C=CC=CC=1.[Br:23][C:24]1[CH:29]=[C:28]([F:30])[CH:27]=[CH:26][C:25]=1[S:31](Cl)(=[O:33])=[O:32]>C(Cl)Cl>[Br:23][C:24]1[CH:29]=[C:28]([F:30])[CH:27]=[CH:26][C:25]=1[S:31]([NH:1][C:2]1[C:11]([C:12]([O:14][CH3:15])=[O:13])=[C:10]2[C:5]([CH:6]3[CH2:16][CH:7]3[CH2:8][O:9]2)=[CH:4][CH:3]=1)(=[O:33])=[O:32]
参加物実験手順後処理出典と根拠反応ノート

参加物

5

反応物 3

HCID 1049PyridineHCID 27782162-Bromo-4-fluorobenzene-1-sulfonyl chlorideHCID 86713293Methyl 5-amino-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylate2 回

生成物 1

HCID 86713292methyl (1aRS,7bSR)-5-(2-bromo-4-fluorobenzenesulfonylamino)-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylate収率 83.3%

試薬・触媒・溶媒 1

HCID 6344
Dichloromethane
溶媒

実験手順

Methyl (1aRS,7bSR)-5-amino-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylate (Intermediate 42, 0.120 g) was suspended in DCM (5 mL). Pyridine (0.885 mL) and 2-bromo-4-fluorobenzenesulfonyl chloride (0.180 g) were added. The mixture was stirred at room temperature for 5 hours then concentrated in vacuo. The residue was dissolved in ethyl acetate and washed with 0.5M aqueous hydrochloric acid solution, dried (MgSO4) and filtered. The filtrate was concentrated in vacuo and the residue was purified by chromatography on silica, eluting with a mixture of ethyl acetate and cyclohexane, with a gradient of 5-10% to give methyl (1aRS,7bSR)-5-(2-bromo-4-fluorobenzenesulfonylamino)-1,1a,2,7b-tetrahydrocyclopropa[c]chromene-4-carboxylate (0.208 g) as a colourless oil.

後処理

  1. concentrationthen concentrated in vacuo
  2. dissolutionThe residue was dissolved in ethyl acetate
  3. washwashed with 0.5M aqueous hydrochloric acid solution
  4. dry with materialdried (MgSO4)
  5. filtrationfiltered
  6. concentrationThe filtrate was concentrated in vacuo
  7. customthe residue was purified by chromatography on silica
  8. washeluting with a mixture of ethyl acetate and cyclohexane, with a gradient of 5-10%

出典と根拠

ORDレコード
ord-464a30c7897041e49c9dfd7d7b5c18fe
出典データセット
uspto-grants-2016_03
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09290472B2

反応ノート

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