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Methanol → 5-[4-(4,6-Dihydroxy-2,5,7,8-tetramethylchroman-2-ylmethoxy)benzyl]thiazolidine-2,4-dione

HRID 1030370
ノート
印刷プレビュー

反応式

HRID 1030370 の反応式
[BH4-].[Na+].[OH:3][C:4]1[C:5]([CH3:34])=[C:6]2[C:11](=[C:12]([CH3:15])[C:13]=1[CH3:14])[O:10][C:9]([CH2:17][O:18][C:19]1[CH:32]=[CH:31][C:22]([CH2:23][CH:24]3[S:28][C:27](=[O:29])[NH:26][C:25]3=[O:30])=[CH:21][CH:20]=1)([CH3:16])[CH2:8][C:7]2=[O:33].CO.C(=O)([O-])[O-].[K+].[K+]>C(O)(=O)C>[OH:33][CH:7]1[C:6]2[C:11](=[C:12]([CH3:15])[C:13]([CH3:14])=[C:4]([OH:3])[C:5]=2[CH3:34])[O:10][C:9]([CH2:17][O:18][C:19]2[CH:32]=[CH:31][C:22]([CH2:23][CH:24]3[S:28][C:27](=[O:29])[NH:26][C:25]3=[O:30])=[CH:21][CH:20]=2)([CH3:16])[CH2:8]1
参加物実験手順後処理出典と根拠反応ノート

参加物

6

反応物 4

HCID 887MethanolHCID 11430Potassium CarbonateHCID 4311764Sodium borohydrideHCID 98252415-[4-(6-Hydroxy-2,5,7,8-tetramethyl-4-oxochroman-2-ylmethoxy)benzyl]thiazolidine-2,4-dione

生成物 1

HCID 136058355-[4-(4,6-Dihydroxy-2,5,7,8-tetramethylchroman-2-ylmethoxy)benzyl]thiazolidine-2,4-dione

試薬・触媒・溶媒 1

HCID 176
Acetic Acid
溶媒

実験手順

450 mg of sodium borohydride were added to a mixture of 278 mg of 5-[4-(6-hydroxy-2,5,7,8-tetramethyl-4-oxochroman-2-ylmethoxy)benzyl]thiazolidine -2,4-dione (prepared as described in Example 22 of copending U.S. Ser. No. 644,996) and 9 ml of methanol, and the mixture was stirred for 2 hours at room temperature, after which a 1% w/v aqueous solution of acetic acid was added and the mixture was neutralized with an aqueous solution of potassium carbonate. It was then extracted with ethyl acetate. The ethyl acetate extract was washed with water and dried over anhydrous sodium sulfate. The ethyl acetate was distilled from the extract under reduced pressure and the resulting residue was purified by silica gel column chromatography, using a 5:3 by volume mixture of hexane and ethyl acetate as eluent, to give the title compound, melting at 102°-118° C.

後処理

  1. customprepared
  2. extractionIt was then extracted with ethyl acetate
  3. extractionThe ethyl acetate extract
  4. washwas washed with water
  5. dry with materialdried over anhydrous sodium sulfate
  6. distillationThe ethyl acetate was distilled from the
  7. extractionextract under reduced pressure
  8. customthe resulting residue was purified by silica gel column chromatography
  9. additionby volume mixture of hexane and ethyl acetate as eluent

出典と根拠

ORDレコード
ord-ac57d937d8aa45ec89fd63ec13dd2c6c
出典データセット
uspto-grants-1992_04
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US05104888

反応ノート

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