Ammonium Chloride → (2S,4R)-N-t-butoxycarbonyl-4-t-butyldimethylsiloxy-2-[hydroxy(4-hydroxymethyl-1-naphthyl)methyl]pyrrolidine

HRID 725947

反応式

HRID 725947 の反応式
[OH:1][CH2:2][C:3]1[C:12]2[C:7](=[CH:8][CH:9]=[CH:10][CH:11]=2)[C:6](Br)=[CH:5][CH:4]=1.[C:14]([O:18][C:19]([N:21]1[CH2:27][C@H:26]([O:28][Si:29]([C:32]([CH3:35])([CH3:34])[CH3:33])([CH3:31])[CH3:30])[CH2:25][C@H:22]1[CH:23]=[O:24])=[O:20])([CH3:17])([CH3:16])[CH3:15].[Cl-].[NH4+]>O1CCCC1>[C:14]([O:18][C:19]([N:21]1[CH2:27][C@H:26]([O:28][Si:29]([C:32]([CH3:35])([CH3:34])[CH3:33])([CH3:31])[CH3:30])[CH2:25][C@H:22]1[CH:23]([OH:24])[C:6]1[C:7]2[C:12](=[CH:11][CH:10]=[CH:9][CH:8]=2)[C:3]([CH2:2][OH:1])=[CH:4][CH:5]=1)=[O:20])([CH3:17])([CH3:16])[CH3:15]

参加物

5

反応物 3

HCID 25517Ammonium ChlorideHCID 10969557tert-Butyl (2S,4R)-4-((tert-butyldimethylsilyl)oxy)-2-formylpyrrolidine-1-carboxylateHCID 12749145(4-Bromonaphthalen-1-yl)methanol

生成物 1

HCID 22881087(2S,4R)-N-t-butoxycarbonyl-4-t-butyldimethylsiloxy-2-[hydroxy(4-hydroxymethyl-1-naphthyl)methyl]pyrrolidine収率 44%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒3 回

反応条件

温度
-72 °C

実験手順

A solution of 4-hydroxymethyl-1-bromonaphthalene (3 g, 12.7 mmol) in tetrahydrofuran (50 ml) was added dropwise to a solution of 1.6M butyl lithium-hexane solution (20.6 ml, 32.9 mmol) in tetrahydrofuran (100 ml) at -72° C. in a nitrogen stream over 30 minutes. The resulting reaction solution was stirred at -72° C. for 30 minutes and a solution of (2S,4R)-N-t-butoxycarbonyl-4-(t-butyldimethylsiloxy)prolinal (4.17 g, 12.7 mmol) in tetrahydrofuran (50 ml) was added dropwise over 10 minutes. Then, the reaction solution was stirred at -63° C. for 10 minutes. After addition of saturated aqueous ammonium chloride, the reaction solution was concentrated in vacuo. The resulting residue was poured into a liquid mixture of ethyl acetate with water. The organic layer was washed with saturated aqueous sodium chloride, dried over anhydrous sodium sulfate, and concentrated in vacuo. The resulting oily residue was subjected to silica gel column chromatography (Wakogel™ C-300 heptane-ethyl acetate 3:1→2:1) to give (2S,4R)-N-t-butoxycarbonyl-4-t-butyldimethylsiloxy-2-[hydroxy(4-hydroxymethyl-1-naphthyl)methyl]pyrrolidine (2.71 g, yield: 44.0%) as a colorless oily substance.

後処理

  1. customThe resulting reaction solution
  2. stirringThen, the reaction solution was stirred at -63° C. for 10 minutes
  3. concentrationthe reaction solution was concentrated in vacuo
  4. additionThe resulting residue was poured into a liquid mixture of ethyl acetate with water
  5. washThe organic layer was washed with saturated aqueous sodium chloride
  6. dry with materialdried over anhydrous sodium sulfate
  7. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-3e4d674bf9c447c78e8fc76bb3e863f6
出典データセット
uspto-grants-1998_01
特許番号
US05707987

関連ノート

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