Oxalic Acid → (4E,13E)-(6RS,9alpha,11alpha,15S)-6,9-Epoxy-11,15-bis(tetrahydropyran-2-yloxy)prosta-4,13-dienoic acid

HRID 434738ノート

反応式

HRID 434738 の反応式
C[O:2][C:3](=[O:38])[CH2:4][CH2:5]/[CH:6]=[CH:7]/[CH:8]1[O:37][C@H:11]2[CH2:12][C@@H:13]([O:30][CH:31]3[CH2:36][CH2:35][CH2:34][CH2:33][O:32]3)[C@H:14](/[CH:15]=[CH:16]/[C@@H:17]([O:23][CH:24]3[CH2:29][CH2:28][CH2:27][CH2:26][O:25]3)[CH2:18][CH2:19][CH2:20][CH2:21][CH3:22])[C@H:10]2[CH2:9]1.[OH-].[K+].C(O)(=O)C(O)=O>CO>[O:37]1[C@H:11]2[CH2:12][C@@H:13]([O:30][CH:31]3[CH2:36][CH2:35][CH2:34][CH2:33][O:32]3)[C@H:14](/[CH:15]=[CH:16]/[C@@H:17]([O:23][CH:24]3[CH2:29][CH2:28][CH2:27][CH2:26][O:25]3)[CH2:18][CH2:19][CH2:20][CH2:21][CH3:22])[C@H:10]2[CH2:9][CH:8]1/[CH:7]=[CH:6]/[CH2:5][CH2:4][C:3]([OH:38])=[O:2]

参加物

5

反応物 3

HCID 971Oxalic AcidHCID 14797Potassium HydroxideHCID 86738984(4E,13E)-(6RS,9alpha,11alpha,15S)-6,9-Epoxy-11,15-bis(tetrahydropyran-2-yloxy)prosta-4,13-dienoic acid methyl ester

生成物 1

HCID 86738985(4E,13E)-(6RS,9alpha,11alpha,15S)-6,9-Epoxy-11,15-bis(tetrahydropyran-2-yloxy)prosta-4,13-dienoic acid収率 98.4%

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

To a solution of 480 mg of (4E,13E)-(6RS,9α,11α,15S)-6,9-epoxy-11,15-bis(tetrahydropyran-2-yloxy)prosta-4,13-dienoic acid methyl ester (prepared as described in Example 7) in 3 ml of methanol was added 5 ml of a 5% aqueous solution of potassium hydroxide at 45° to 50° C., and the mixture was stirred for one hour at the same temperature. The reaction mixture was then acidified to pH 5 to 6 with an aqueous solution of oxalic acid and extracted with ethyl acetate. The extract was washed with water and an aqueous solution of sodium chloride, dried over magnesium sulphate and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel using a mixture of cyclohexane and ethanol (20:1) as eluent to give 460 mg of the title compound having the following physical characteristics:

後処理

  1. extractionextracted with ethyl acetate
  2. washThe extract was washed with water
  3. dry with materialan aqueous solution of sodium chloride, dried over magnesium sulphate
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by column chromatography on silica gel using
  6. additiona mixture of cyclohexane and ethanol (20:1) as eluent

出典と根拠

ORDレコード
ord-10319c8747864fb4b46b71159abf1edb
出典データセット
uspto-grants-1983_08
特許番号
US04399147

反応ノート

読み込み中…