Chlorodiphenylmethane → 1-(Diphenylmethyl)-1H-pyrazole-4-carboxylic acid ethyl ester

HRID 131633

反応式

HRID 131633 の反応式
[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[N:8][NH:9][CH:10]=1)=[O:5])[CH3:2].[CH:11](Cl)([C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1.C(=O)([O-])[O-].[K+].[K+]>CN1CCCC1=O.O>[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[N:8][N:9]([CH:11]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)[CH:10]=1)=[O:5])[CH3:2]

参加物

6

反応物 3

HCID 7035ChlorodiphenylmethaneHCID 11430Potassium CarbonateHCID 142179ethyl 1H-pyrazole-4-carboxylate

生成物 1

HCID 693134381-(Diphenylmethyl)-1H-pyrazole-4-carboxylic acid ethyl ester

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 13387N-methyl-2-pyrrolidone溶媒

反応条件

温度
100 °C

実験手順

A suspension of 1H-pyrazole-4-carboxylic acid ethyl ester (1.0 g), benzhydryl chloride (1.9 ml) and potassium carbonate (1.48 g) in anhydrous 1-methyl-2-pyrrolidinone (10 ml) was heated at 100° C. under nitrogen for 6 h. It was diluted with water and extracted with ethyl acetate, the organic extracts washed with water, dried over anhydrous magnesium sulfate, filtered and evaporated under reduced pressure. The residue was purified by column chromatography over silica, eluting with i-hexane/ethyl acetate (4:1) followed by i-hexane/ethyl acetate (2:1) to give the sub-title compound (2.18 g).

後処理

  1. extractionextracted with ethyl acetate
  2. washthe organic extracts washed with water
  3. dry with materialdried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. customevaporated under reduced pressure
  6. customThe residue was purified by column chromatography over silica
  7. washeluting with i-hexane/ethyl acetate (4:1)

出典と根拠

ORDレコード
ord-b9eb24beb22d458e8dd7dc49124f29a9
出典データセット
uspto-grants-2008_06
特許番号
US07384951B2

関連ノート

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