Ethyl Acetate → ethyl (R)-{3-{[2-(4,5-diphenyloxazole-2-yl)-1-hydroxy-2-cyclohexen-1-yl]methyl}phenoxy}-acetate

HRID 379319ノート

反応式

HRID 379319 の反応式
[C:1]1([C:7]2[N:8]=[C:9]([C:18]3[C@:19]([O:49][Si](C)(C)C)([CH2:24][C:25]4[CH:30]=[CH:29][CH:28]=[C:27]([O:31][Si](C(C)(C)C)(C5C=CC=CC=5)C5C=CC=CC=5)[CH:26]=4)[CH2:20][CH2:21][CH2:22][CH:23]=3)[O:10][C:11]=2[C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[F-].C([N+](CCCC)(CCCC)CCCC)CCC.[CH3:72][CH2:73][O:74][C:75]([CH3:77])=[O:76]>C1COCC1>[C:1]1([C:7]2[N:8]=[C:9]([C:18]3[C@@:19]([CH2:24][C:25]4[CH:26]=[C:27]([CH:28]=[CH:29][CH:30]=4)[O:31][CH2:77][C:75]([O:74][CH2:73][CH3:72])=[O:76])([OH:49])[CH2:20][CH2:21][CH2:22][CH:23]=3)[O:10][C:11]=2[C:12]2[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

参加物

5

反応物 3

HCID 8857Ethyl AcetateHCID 2724141Tetrabutylammonium FluorideHCID 15550206(R)-2-(4,5-diphenyloxazol-2-yl)-1-trimethylsilyloxy-1-[3-(tertbutyldiphenylsiloxy)benzyl]-2-cyclohexene

生成物 1

HCID 15550207ethyl (R)-{3-{[2-(4,5-diphenyloxazole-2-yl)-1-hydroxy-2-cyclohexen-1-yl]methyl}phenoxy}-acetate

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

To a solution of (R)-2-(4,5-diphenyloxazol-2-yl)-1-trimethylsilyloxy-1-[3-(tertbutyldiphenylsiloxy)benzyl]-2-cyclohexene (10 g) in THF (50 ml) was added tetrabutylammonium fluoride (41 ml, 1M solution in THF) at room temperature. After being stirred for 4 hours, the mixture was diluted with EtOAc. The mixture was washed with 1N-HCl solution and brine and evaporated. The residue was dissolved in DMF (50 ml), followed by addition of K2CO3 (5 g) and ethyl bromoacetate (2.0 ml) at room temperature. The mixture was stirred for 2 hours at the same temperature and partitioned between EtOAc and water. The organic layer was washed with water and brine and evaporated in vacuo. The residue was purified by chromatography on silica gel to give ethyl (R)-{3-{[2-(4,5-diphenyloxazole-2-yl)-1-hydroxy-2-cyclohexen-1-yl]methyl}phenoxy}-acetate (5.3 g).

後処理

  1. washThe mixture was washed with 1N-HCl solution and brine
  2. customevaporated
  3. dissolutionThe residue was dissolved in DMF (50 ml)
  4. additionfollowed by addition of K2CO3 (5 g) and ethyl bromoacetate (2.0 ml) at room temperature
  5. stirringThe mixture was stirred for 2 hours at the same temperature
  6. custompartitioned between EtOAc and water
  7. washThe organic layer was washed with water and brine
  8. customevaporated in vacuo
  9. customThe residue was purified by chromatography on silica gel

出典と根拠

ORDレコード
ord-bf2eb6408ae7429d83bed8b74b6077d7
出典データセット
uspto-grants-2001_10
特許番号
US06297267B1

反応ノート

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