Potassium Carbonate → 6-Ethynylthiochroman-4-one

HRID 1417687ノート

反応式

HRID 1417687 の反応式
C[Si](C)(C)[C:3]#[C:4][C:5]1[CH:6]=[CH:7][C:8]2[S:13][CH2:12][CH2:11][C:10](=[O:14])[C:9]=2[CH:15]=1.C([O-])([O-])=O.[K+].[K+]>CO.O>[C:4]([C:5]1[CH:6]=[CH:7][C:8]2[S:13][CH2:12][CH2:11][C:10](=[O:14])[C:9]=2[CH:15]=1)#[CH:3]

参加物

5

反応物 2

HCID 11430Potassium CarbonateHCID 154909942,3-dihydro-6-(2-trimethylsilylethynyl)-(4H)-1-benzothiopyran-4-one

生成物 1

HCID 223237716-Ethynylthiochroman-4-one

試薬・触媒・溶媒 2

HCID 887Methanol溶媒HCID 962Water溶媒

実験手順

A solution containing 600.0 mg (2.25 mmol) of 2,3-dihydro-6-(2-trimethylsilylethynyl)-(4H)-1-benzothiopyran-4-one and 100.0 mg (0.72 mmol) K2CO3 in 15 ml MeOH was stirred at room temperature for 20 hours. The solution was diluted with H2O and extracted with Et2O. The combined organic layers were washed with H2O and saturated aqueous NaCl before being dried over MgSO4. Removal of the solvents under reduced pressure afforded the title compound as an orange solid. 1H NMR (CDCl3): δ 8.17 (1H, d, J=1.8 Hz), 7.40 (1H, dd, J=1.8, 8.2 Hz), 7.19 (1H, d, J=8.2 Hz), 3.22 (2H, t, J=6.3 Hz), 3.08 (1H, s) 2.94 (2H, t, J=6.3 Hz).

後処理

  1. extractionextracted with Et2O
  2. washThe combined organic layers were washed with H2O and saturated aqueous NaCl
  3. dry with materialbefore being dried over MgSO4
  4. customRemoval of the solvents under reduced pressure

出典と根拠

ORDレコード
ord-0998a91b4b4b49b19d80b54469790eff
出典データセット
uspto-grants-1999_03
特許番号
US05877207

反応ノート

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