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Nitric Acid → (4aS,5S,7aS)-7a-(2-fluoro-5-nitrophenyl)-5-(trifluoromethyl)-4a,5,7,7a-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-amine

HRID 1429613
ノート
印刷プレビュー

反応式

HRID 1429613 の反応式
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C@:8]12[CH2:16][O:15][C@H:14]([C:17]([F:20])([F:19])[F:18])[C@H:13]1[CH2:12][S:11][C:10]([NH:21]C(=O)C1C=CC=CC=1)=[N:9]2.S(=O)(=O)(O)O.[N+:35]([O-])([OH:37])=[O:36].[OH-].[Na+]>C(O)(C(F)(F)F)=O>[F:1][C:2]1[CH:7]=[CH:6][C:5]([N+:35]([O-:37])=[O:36])=[CH:4][C:3]=1[C@:8]12[CH2:16][O:15][C@H:14]([C:17]([F:20])([F:19])[F:18])[C@H:13]1[CH2:12][S:11][C:10]([NH2:21])=[N:9]2
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

6

反応物 4

HCID 944Nitric AcidHCID 1118Sulfuric AcidHCID 14798Sodium HydroxideHCID 60168236N-((4aS,5S,7aS)-7a-(2-fluorophenyl)-5-(trifluoromethyl)-4a,5,7,7a-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-yl)benzamide

生成物 1

HCID 60168240(4aS,5S,7aS)-7a-(2-fluoro-5-nitrophenyl)-5-(trifluoromethyl)-4a,5,7,7a-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-amine

試薬・触媒・溶媒

1
HCID 6422Trifluoroacetic acid溶媒

反応条件

温度
0 °C

実験手順

N-((4aS,5S,7aS)-7a-(2-Fluorophenyl)-5-(trifluoromethyl)-4a,5,7,7a-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-yl)benzamide (5.15 g) was dissolved in TFA (75 mL), and the solution was cooled to 0° C. Sulfuric acid (conc., 20 mL) was added, followed by fuming nitric acid (2 mL) dropwise over 20 mins. After stirring at 0° C. for 90 mins, the reaction mixture was poured onto ice (200 g) and basified to pH 12 with 6N NaOH (aq.). After allowing the ice to melt, the mixture was extracted with EtOAc (3×500 mL), and the combined organic portions dried over MgSO4 and evaporated to afford the title compound (22.1 g, purity approx. 71%) which was used in the subsequent step without purification. 1H NMR (400 MHz, CDCl3) δ ppm 2.89 (d, J=3.8 Hz, 1 H), 3.09 (br. s., 1H), 3.28-3.54 (m, 1 H), 3.80-4.03 (m, 1 H), 4.50-4.70 (m, 3 H), 4.71-4.86 (m, 1 H), 7.21-7.30 (m, 1 H), 8.18-8.28 (m, 1 H), 8.45 (dd, J=6.8, 2.8 Hz, 1 H)

後処理

  1. additionthe reaction mixture was poured onto ice (200 g)
  2. extractionthe mixture was extracted with EtOAc (3×500 mL)
  3. dry with materialthe combined organic portions dried over MgSO4
  4. customevaporated

出典と根拠

ORDレコード
ord-2bc5cf31ec584e59b8392f9d44eb2d8f
出典データセット
uspto-grants-2015_01
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08940734B2

反応ノート

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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