Potassium Carbonate → 2-(4-Bromo-3,4,4-trifluorobutylthio)thiazole

HRID 725003ノート

反応式

HRID 725003 の反応式
[SH:1][C:2]1[S:3][CH:4]=[CH:5][N:6]=1.[Br:7][C:8]([F:15])([F:14])[CH:9]([F:13])[CH2:10][CH2:11]Br.C(=O)([O-])[O-].[K+].[K+]>CC(C)=O>[Br:7][C:8]([F:15])([F:14])[CH:9]([F:13])[CH2:10][CH2:11][S:1][C:2]1[S:3][CH:4]=[CH:5][N:6]=1

参加物

5

反応物 3

HCID 11430Potassium CarbonateHCID 27834041,4-Dibromo-1,1,2-trifluorobutaneHCID 178527881HCID 178527881、化合物

生成物 1

HCID 218505172-(4-Bromo-3,4,4-trifluorobutylthio)thiazole収率 96.5%

試薬・触媒・溶媒 1

HCID 180Acetone溶媒

実験手順

2-Mercaptothiazole (11.7 g) in acetone (30 cm3) containing 1,4-dibromo-1,1,2-trifluorobutane (27.0 g) was treated portionwise with anhydrous potassium carbonate (13.8 g) under an atmosphere of nitrogen. The reaction was stirred for 1.5 hours, filtered and the insolubles washed with further acetone (4×25 cm3). The filtrate was evaporated under reduced pressure and the residue fractionated by chromatography (silica, eluant 10% ethyl acetate in hexane) to give 2-(4-bromo-3,4,4-trifluorobutylthio)thiazole (29.5 g). 1H NMR: δ 2.2-2.5(2H,m); 3.2-3.6(2H,m); 4.7-5.0(1H,m); 7.23(1H,d); 7.68(1H,d).

後処理

  1. filtrationfiltered
  2. washthe insolubles washed with further acetone (4×25 cm3)
  3. customThe filtrate was evaporated under reduced pressure

出典と根拠

ORDレコード
ord-095f3b197e044ad49d2a696423a78f70
出典データセット
uspto-grants-1998_01
特許番号
US05705516

反応ノート

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