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Dimethylformamide → Ethyl2-butyl3-(4-bromobenzoyl)pyrazolo(1,5-a) pyridine6-carboxylate

HRID 266054
ノート
印刷プレビュー

反応式

HRID 266054 の反応式
CC1C=C(C)C=C(C)C=1S([O-])(=O)=O.[NH2:14][N+:15]1[CH:20]=[CH:19][CH:18]=[C:17]([C:21]([O:23][CH2:24][CH3:25])=[O:22])[CH:16]=1.CN(C)C=O.C(=O)([O-])[O-].[K+].[K+].[Br:37][C:38]1[CH:43]=[CH:42][C:41]([C:44](=[O:51])[C:45]#[C:46][CH2:47][CH2:48][CH2:49][CH3:50])=[CH:40][CH:39]=1>O>[CH2:24]([O:23][C:21]([C:17]1[CH:18]=[CH:19][C:20]2[N:15]([N:14]=[C:46]([CH2:47][CH2:48][CH2:49][CH3:50])[C:45]=2[C:44](=[O:51])[C:41]2[CH:42]=[CH:43][C:38]([Br:37])=[CH:39][CH:40]=2)[CH:16]=1)=[O:22])[CH3:25]
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 4

HCID 6228DimethylformamideHCID 11430Potassium Carbonate3 回HCID 122084841-Amino-3-(ethoxycarbonyl)pyridin-1-ium 2,4,6-trimethylbenzenesulfonate4 回HCID 544491361-(4-Bromophenyl) 2-heptyn-1-one

生成物 1

HCID 21472338Ethyl2-butyl3-(4-bromobenzoyl)pyrazolo(1,5-a) pyridine6-carboxylate収率 45.6%

試薬・触媒・溶媒

1
HCID 962Water溶媒

実験手順

A mixture of 13.8 g of ethyl 1-aminopyridinium 3-carboxylate 2,4,6-trimethylbenzenesulphonate (compound A) (Synthesis 1977, page 1, TAMURA, et al.), 150 ml of dimethylformamide, 5.7 g of potassium carbonate and 10 g of the product of Step A of Example 1 were stirred for 3 hours at room temperature and then 6.9 g of compound A and 2.85 g of potassium carbonate were added. The mixture was stirred for 2 hours. Then 6.9 g of compound A and 2.85 g of potassium carbonate were added and the mixture was stirred for 2 hours at ambient temperature. The mixture was taken up in water and extracted with ethyl acetate. Separation was carried out by chromatography on silica (essence G: 80/ethyl acetate: 20) to obtain 7.38 g of the expected product (M.p.≤50° C.) and 8.25 g of the corresponding isomer of Example 16.

後処理

  1. stirringThe mixture was stirred for 2 hours
  2. stirringthe mixture was stirred for 2 hours at ambient temperature
  3. extractionextracted with ethyl acetate
  4. customSeparation

出典と根拠

ORDレコード
ord-ce923dd23ee64f87b8f674d49b86bcc9
出典データセット
uspto-grants-1997_07
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US05650414

反応ノート

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