Tributylphosphine → HCID 69546165、化合物

HRID 1794556

反応式

HRID 1794556 の反応式
C(OC(N=NC(OC(C)C)=O)=O)(C)C.[CH2:15]([O:17][C:18]([C:20]1[S:21][C:22]([C:27]([O:29][CH2:30][CH3:31])=[O:28])=[C:23]([OH:26])[C:24]=1[OH:25])=[O:19])[CH3:16].[F:32][C:33]([F:38])([CH2:36]O)[CH2:34]O.C(P(CCCC)CCCC)CCC>O1CCCC1>[CH2:30]([O:29][C:27]([C:22]1[S:21][C:20]([C:18]([O:17][CH2:15][CH3:16])=[O:19])=[C:24]2[C:23]=1[O:26][CH2:36][C:33]([F:38])([F:32])[CH2:34][O:25]2)=[O:28])[CH3:31]

参加物

6

反応物 4

HCID 13831TributylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylate2 回HCID 957442,2-Difluoropropane-1,3-diolHCID 2455033,4-Dihydroxy-thiophene-2,5-dicarboxylic acid diethyl ester

生成物 1

HCID 69546165HCID 69546165、化合物

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

反応条件

温度
100 °C

実験手順

3,3-Difluoro-3,4-dihydro-2H-thieno[3,4-b][1,4]-dioxepine-6,8-dicarboxylic acid diethyl ester was synthesized by adding dropwise 3.4 mL (17.2 mmol) of azodicarboxylic acid diisopropyl ester (ADC) to a mixture of 1.77 g (6.67 mmol) of 3,4-dihydroxythiophen-2,5-dicarboxylic acid diethyl ester, 748 mg of 2,2-difluoro-1,3-propanediol and 4.3 mL of tributylphosphine in 12 mL of absolute tetrahydrofuran under argon at 20° C. with ice-cooling. After completion of the addition of ADC the resulting mixture was allowed to stand at room temperature for 4 days. The tetrahydrofuran was then distilled off and the residue heated for 12.5 hours at 100° C. after which it was dissolved in ethyl acetate. The ethyl acetate solution was washed three times with saturated sodium bicarbonate solution, then with deionized water, dried with anhydrous magnesium sulphate, concentrated and the residue chromatographically purified on a kieselgel 60 column with heptane/ethyl acetate as eluant. 335 mg (corresponding to a yield of 15%) of the desired product was obtained with a melting point of 121–122° C., as characterized by:

後処理

  1. custom3,3-Difluoro-3,4-dihydro-2H-thieno[3,4-b][1,4]-dioxepine-6,8-dicarboxylic acid diethyl ester was synthesized
  2. temperaturecooling
  3. distillationThe tetrahydrofuran was then distilled off
  4. dissolutionwas dissolved in ethyl acetate
  5. washThe ethyl acetate solution was washed three times with saturated sodium bicarbonate solution
  6. dry with materialwith deionized water, dried with anhydrous magnesium sulphate
  7. concentrationconcentrated
  8. customthe residue chromatographically purified on a kieselgel 60 column with heptane/ethyl acetate as eluant

出典と根拠

ORDレコード
ord-919f8f5fbfa64bd7b3507f868f406aaf
出典データセット
uspto-grants-2006_04
特許番号
US07022811B2

関連ノート

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