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Oxygen → tert-butyl ((5R,6S)-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 627602
ノート
印刷プレビュー

反応式

HRID 627602 の反応式
[CH2:1]([C@@H: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+].O=O.[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])[C@H: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 977OxygenHCID 516892Sodium BicarbonateHCID 4311764Sodium borohydrideHCID 86728122tert-butyl ((5R,6S)-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 90307364tert-butyl ((5R,6S)-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

試薬・触媒・溶媒 2

HCID 887Methanol溶媒HCID 6344Dichloromethane溶媒

反応条件

温度
-78 °C

実験手順

To a solution of tert-butyl ((5R,6S)-6-allyl-5-(2-fluoro-5-nitrophenyl)-2,2,5-trimethyl-1,1-dioxido-5,6-dihydro-2H-1,4-thiazin-3-yl)carbamate (250 mg, 0.532 mmol) (cis-isomer from Step 1) in DCM (4 ml) and MeOH (1.3 ml), was added sodium bicarbonate (89 mg, 1.065 mmol) and the mixture was cooled to −78° C. The resulting mixture was ozonolized for about 10 min or until analysis showed no starting material present. The stream of oxygen was passed through the solution for 5 min, then solid sodium borohydride (40.3 mg, 1.065 mmol) was added to the mixture. The flask was removed from the bath and allowed to reach RT and stirred for 30 min. The reaction was quenched with saturated NH4Cl solution (caution: there is evolution of gas), diluted with water to dissolve solids and extracted into EtOAc. The organic layer was washed with brine, dried over MgSO4, filtered and concentrated to afford tert-butyl ((5R,6S)-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 which was used in the next step without further purification.

後処理

  1. customThe flask was removed from the bath
  2. customto reach RT
  3. customThe reaction was quenched with saturated NH4Cl solution (caution: there is evolution of gas)
  4. additiondiluted with water
  5. dissolutionto dissolve solids
  6. extractionextracted into EtOAc
  7. washThe organic layer was washed with brine
  8. dry with materialdried over MgSO4
  9. filtrationfiltered
  10. concentrationconcentrated

出典と根拠

ORDレコード
ord-9fca819644ee4c01922ba552114e72b6
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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