3,4-dihydro-2H-pyran → 6-chloro-3-iodo-1-(tetrahydro-pyran-2-yl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid ethyl ester

HRID 82023ノート

反応式

HRID 82023 の反応式
[CH2:1]([O:3][C:4]([C:6]1[C:7]2[C:15]([I:16])=[N:14][NH:13][C:8]=2[N:9]=[C:10]([Cl:12])[CH:11]=1)=[O:5])[CH3:2].O.C1(C)C=CC(S(O)(=O)=O)=CC=1.[O:29]1[CH:34]=[CH:33][CH2:32][CH2:31][CH2:30]1>C(Cl)(Cl)Cl>[CH2:1]([O:3][C:4]([C:6]1[C:7]2[C:15]([I:16])=[N:14][N:13]([CH:30]3[CH2:31][CH2:32][CH2:33][CH2:34][O:29]3)[C:8]=2[N:9]=[C:10]([Cl:12])[CH:11]=1)=[O:5])[CH3:2]

参加物

5

反応物 3

HCID 80803,4-dihydro-2H-pyranHCID 521998p-Toluenesulfonic acid monohydrateHCID 178468965HCID 178468965、化合物

生成物 1

HCID 866781586-chloro-3-iodo-1-(tetrahydro-pyran-2-yl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid ethyl ester収率 54.2%

試薬・触媒・溶媒 1

HCID 6212Chloroform溶媒

実験手順

To a solution of 6-chloro-3-iodo-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid ethyl ester (14 g, 39.8 mmol) and p-toluenesulfonic acid monohydrate (0.75 g, 3.9 mmol) in anhydrous chloroform (200 ml) at 0° C. was added dropwise 3,4-dihydro-2H-pyran (5.45 ml, 59.7 mmol). The reaction mixture was allowed to warm to room temperature, stirred overnight and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography using a stepwise gradient of ethyl acetate (0-20%) in cyclohexane to afford the title compound as a yellow solid (9.4 g, 54%). LC/MS (Method LC8): Rt=2.08 min; m/z=351 [M+H-THP]+.

後処理

  1. concentrationconcentrated under reduced pressure

出典と根拠

ORDレコード
ord-8b3c2d24794a40659d4e672c3317ebc7
出典データセット
uspto-grants-2014_09
特許番号
US08846712B2

反応ノート

読み込み中…