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Sodium Bicarbonate → racemic tert-butyl ((5RS,6RS)-5-(2-fluoro-5-nitrophenyl)-6-(2-hydroxyethyl)-2,2,5-trimethyl-1,1-dioxido-5,6-dihydro-2H-1,4-thiazin-3-yl)carbamate

HRID 627597
ノート
印刷プレビュー

反応式

HRID 627597 の反応式
[CH2:1]([CH:4]1[S:9](=[O:11])(=[O:10])[C:8]([CH3:13])([CH3:12])[C:7]([NH:14][C:15](=[O:21])[O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[N:6][C:5]1([C:23]1[CH:28]=[C:27]([N+:29]([O-:31])=[O:30])[CH:26]=[CH:25][C:24]=1[F:32])[CH3:22])[CH:2]=C.C(=O)(O)[O-:34].[Na+].[BH4-].[Na+]>C(Cl)Cl.CO>[F:32][C:24]1[CH:25]=[CH:26][C:27]([N+:29]([O-:31])=[O:30])=[CH:28][C:23]=1[C:5]1([CH3:22])[CH:4]([CH2:1][CH2:2][OH:34])[S:9](=[O:11])(=[O:10])[C:8]([CH3:13])([CH3:12])[C:7]([NH:14][C:15](=[O:21])[O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[N:6]1
参加物実験手順後処理出典と根拠反応ノート

参加物

6

反応物 3

HCID 516892Sodium BicarbonateHCID 4311764Sodium borohydrideHCID 86728096tert-butyl ((5RS,6SR)-6-allyl-5-(2-fluoro-5-nitrophenyl)-2,2,5-trimethyl-1,1-dioxido-5,6-dihydro-2H-1,4-thiazin-3-yl)carbamate

生成物 1

HCID 131735324racemic tert-butyl ((5RS,6RS)-5-(2-fluoro-5-nitrophenyl)-6-(2-hydroxyethyl)-2,2,5-trimethyl-1,1-dioxido-5,6-dihydro-2H-1,4-thiazin-3-yl)carbamate収率 99%

試薬・触媒・溶媒 2

HCID 887Methanol溶媒
HCID 6344Dichloromethane溶媒

実験手順

A solution of tert-butyl ((5RS,6RS)-6-allyl-5-(2-fluoro-5-nitrophenyl)-2,2,5-trimethyl-1,1-dioxido-5,6-dihydro-2H-1,4-thiazin-3-yl)carbamate (120 mg, 0.256 mmol) in DCM (1.8 ml) and MeOH (0.6 ml) was cooled to −78° C., and sodium bicarbonate (42.9 mg, 0.511 mmol) was added and the mixture was ozonolyzed for 10 min. Oxygen was bubbled through the solution for 2 min, then solid sodium borohydride (14.5 mg, 0.383 mmol) was added to the mixture and the mixture was removed from the cooling bath and was allowed to reach RT and stirred for 30 min. The reaction was quenched with sat. solution of NH4Cl and extracted with EtOAc. The organic layer was washed with brine, dried over MgSO4 and concentrated to afford crude racemic tert-butyl ((5RS,6RS)-5-(2-fluoro-5-nitrophenyl)-6-(2-hydroxyethyl)-2,2,5-trimethyl-1,1-dioxido-5,6-dihydro-2H-1,4-thiazin-3-yl)carbamate (120 mg, 0.253 mmol, 99% yield) which was used without further purification.

後処理

  1. customOxygen was bubbled through the solution for 2 min
  2. customthe mixture was removed from the cooling bath
  3. customto reach RT
  4. customThe reaction was quenched with sat. solution of NH4Cl
  5. extractionextracted with EtOAc
  6. washThe organic layer was washed with brine
  7. dry with materialdried over MgSO4
  8. concentrationconcentrated

出典と根拠

ORDレコード
ord-66ef482e419a40d4a03e8226011ce94e
出典データセット
uspto-grants-2016_04
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09309263B2

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