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Tributylstannane → 6-cyano-2,2-dimethyl-4-{1,2-dihydro-2-oxo-4-(4-p-methoxybenzyloxybutyl)-1pyridinyl-}-2H-benzo[b]pyran

HRID 487654
ノート
印刷プレビュー

反応式

HRID 487654 の反応式
[C:1]([C:3]1[CH:45]=[CH:44][C:6]2[O:7][C:8]([CH3:43])([CH3:42])[CH:9]=[C:10]([N:11]3[CH:16]=[CH:15][C:14]([CH:17](OC(OC4C=CC=CC=4)=S)[CH2:18][CH2:19][CH2:20][O:21][CH2:22][C:23]4[CH:28]=[CH:27][C:26]([O:29][CH3:30])=[CH:25][CH:24]=4)=[CH:13][C:12]3=[O:41])[C:5]=2[CH:4]=1)#[N:2].N(C(C)(C)C#N)=NC(C)(C)C#N.C([SnH](CCCC)CCCC)CCC>C1(C)C=CC=CC=1>[C:1]([C:3]1[CH:45]=[CH:44][C:6]2[O:7][C:8]([CH3:42])([CH3:43])[CH:9]=[C:10]([N:11]3[CH:16]=[CH:15][C:14]([CH2:17][CH2:18][CH2:19][CH2:20][O:21][CH2:22][C:23]4[CH:24]=[CH:25][C:26]([O:29][CH3:30])=[CH:27][CH:28]=4)=[CH:13][C:12]3=[O:41])[C:5]=2[CH:4]=1)#[N:2]
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 5948TributylstannaneHCID 6547AzobisisobutyronitrileHCID 190925096-cyano-2,2-dimethyl-4-{1,2-dihydro-2-oxo-4-(1-phenoxythiocarbonyloxy-4-p-methoxybenzyloxybutyl)-1-pyridinyl}-2H-benzo[b]pyran

生成物 1

HCID 190925536-cyano-2,2-dimethyl-4-{1,2-dihydro-2-oxo-4-(4-p-methoxybenzyloxybutyl)-1pyridinyl-}-2H-benzo[b]pyran収率 94.7%

試薬・触媒・溶媒 1

HCID 1140
Toluene
溶媒

実験手順

In 46 ml of anhydrous toluene, is dissolved 1.44 g of 6-cyano-2,2-dimethyl-4-(1,2-dihydro-2-oxo-4-(1-phenoxythiocarbonyloxy-4-p-methoxybenzyloxybutyl)-1-pyridinyl}-2H-benzo[b]pyran obtained in Example 45. Then, 0.76 g of 2,2'-azobisisobutyronitrile and 1.35 g of tri-n-butyltin hydride are added and reacted at 100° C. for 15 minutes. After the reaction, the reaction mixture is directly purified by silica gel column chromatography using 3/2 mixture of ethyl acetate/n-hexane as a developing solvent. Thus, 1.03 g of 6-cyano-2,2-dimethyl-4-{1,2-dihydro-2-oxo-4-(4-p-methoxybenzyloxybutyl)-1pyridinyl-}-2H-benzo[b]pyran is obtained.

後処理

  1. customreacted at 100° C. for 15 minutes
  2. customAfter the reaction
  3. customthe reaction mixture is directly purified by silica gel column chromatography
  4. addition3/2 mixture of ethyl acetate/n-hexane as a developing solvent

出典と根拠

ORDレコード
ord-90a844919f0d41cc8e30f194016bf5e2
出典データセット
uspto-grants-1994_03
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US05296492

反応ノート

読み込み中…

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