Bromopyruvic Acid → 2-(Cyanomethyl)-1,3-thiazole-4-carboxylic acid

HRID 872752ノート

反応式

HRID 872752 の反応式
[C:1]([CH2:3][C:4]([NH2:6])=[S:5])#[N:2].Br[CH2:8][C:9](=O)[C:10]([OH:12])=[O:11]>C1COCC1>[C:1]([CH2:3][C:4]1[S:5][CH:8]=[C:9]([C:10]([OH:12])=[O:11])[N:6]=1)#[N:2]

参加物

4

反応物 2

HCID 70684Bromopyruvic AcidHCID 14162772-Cyanoethanethioamide

生成物 1

HCID 431403362-(Cyanomethyl)-1,3-thiazole-4-carboxylic acid収率 48.1%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

反応条件

温度
0 °C

実験手順

(Cyano)thioacetamide (2 g, 19.97 mmol) was stirred in excess THF (40 mL) under nitrogen atmosphere. The solution was cooled to 0° C. and the solution of 3-bromopyruvic acid (3.33 g, 19.97 mmol) dissolved in 5 mL THF was added dropwise. The mixture was refluxed for 3 h. Solvent was evaporated and the crude product was purified by flash chromatography (silica, eluent: 0-40% DCM-10% MeOH/DCM mixture) to yield 1.615 g of the title compound. 1H NMR (400 MHz; CDCl3): δ 4.20 (s, 2H), 8.33 (s, 1H).

後処理

  1. additionwas added dropwise
  2. temperatureThe mixture was refluxed for 3 h
  3. customSolvent was evaporated
  4. customthe crude product was purified by flash chromatography (silica, eluent: 0-40% DCM-10% MeOH/DCM mixture)

出典と根拠

ORDレコード
ord-82f1aebca0114e8a9a6220556b768d37
出典データセット
uspto-grants-2015_03
特許番号
US08975254B2

反応ノート

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