Sodium Bicarbonate → (3S,5R,8R,9S,10S,13R,14S,17S)-17-[(E)-methoxyiminomethyl]-10,13-dimethyl-1,2,3,4,5,6,7,8,9,11,12,15,16,17-tetradecahydrocyclopenta[a]phenanthrene-3,14-diol

HRID 1757085ノート

反応式

HRID 1757085 の反応式
Cl.[O:2]([NH2:4])[CH3:3].C([O-])(O)=O.[Na+].[OH:10][C@H:11]1[CH2:28][CH2:27][C@@:26]2([CH3:29])[C@H:13]([CH2:14][CH2:15][C@@H:16]3[C@@H:25]2[CH2:24][CH2:23][C@@:21]2([CH3:22])[C@:17]3([OH:32])[CH2:18][CH2:19][C@@H:20]2[CH:30]=O)[CH2:12]1>O1CCOCC1.O>[CH3:3][O:2]/[N:4]=[CH:30]/[C@H:20]1[CH2:19][CH2:18][C@:17]2([OH:32])[C@H:16]3[C@H:25]([CH2:24][CH2:23][C@:21]12[CH3:22])[C@:26]1([CH3:29])[C@@H:13]([CH2:12][C@@H:11]([OH:10])[CH2:28][CH2:27]1)[CH2:14][CH2:15]3

参加物

6

反応物 3

HCID 516892Sodium BicarbonateHCID 521874O-Methylhydroxylamine hydrochlorideHCID 109033043beta,14beta-Dihydroxy-5beta-androstane-17beta-carboxaldehyde

生成物 1

HCID 10665493(3S,5R,8R,9S,10S,13R,14S,17S)-17-[(E)-methoxyiminomethyl]-10,13-dimethyl-1,2,3,4,5,6,7,8,9,11,12,15,16,17-tetradecahydrocyclopenta[a]phenanthrene-3,14-diol収率 36.7%

試薬・触媒・溶媒 2

HCID 962Water溶媒2 回HCID 312751,4-Dioxane溶媒2 回

実験手順

To a suspension of 0.16 g of methoxylamine hydrochloride and 0.19 g of NaHCO3 in 12 ml of dioxane and 10 ml of water a solution of 0.50 g of 3β,14β-dihydroxy-5β-androstane-17β-carboxaldehyde (Boutagy J. and Thomas R., Aust. J. Chem., 1971, 24, 2723) in 6 ml of dioxane was added dropwise at room temperature. After 15 minutes the solution was diluted with water and extracted with chloroform; the organic layer was dried over anhydrous sodium sulfate and evaporated to dryness. The crude product was purified by flash-chromatography (SiO2) using cyclohexane/ethyl acetate 60/40; the fractions containing the rifle compound were collected and evaporated to dryness. The residue was ground with di-iso-propyl ether/ethanol to give 0.20 g of the title compound (I-aa), as a white solid.

後処理

  1. additionwas added dropwise at room temperature
  2. extractionextracted with chloroform
  3. dry with materialthe organic layer was dried over anhydrous sodium sulfate
  4. customevaporated to dryness
  5. customThe crude product was purified by flash-chromatography (SiO2)
  6. additionthe fractions containing the rifle compound
  7. customwere collected
  8. customevaporated to dryness

出典と根拠

ORDレコード
ord-f76936392df4464c81c84f28e93a2df7
出典データセット
uspto-grants-1995_08
特許番号
US05444055

反応ノート

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