Diethyl Ether → (1-Benzyl-5-bromo-1H-indol-2-yl)methanol

HRID 346840ノート

反応式

HRID 346840 の反応式
C([O:3][C:4]([C:6]1[N:7]([CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[C:8]2[C:13]([CH:14]=1)=[CH:12][C:11]([Br:15])=[CH:10][CH:9]=2)=O)C.[H-].[H-].[H-].[H-].[Li+].[Al+3].[NH4+].[Cl-].CCOCC>C1COCC1>[Br:15][C:11]1[CH:12]=[C:13]2[C:8](=[CH:9][CH:10]=1)[N:7]([CH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[C:6]([CH2:4][OH:3])=[CH:14]2

参加物

6

反応物 4

HCID 3283Diethyl EtherHCID 25517Ammonium ChlorideHCID 21226445Aluminium lithium hydrideHCID 21964289Ethyl 1-benzyl-5-bromo-1H-indole-2-carboxylate

生成物 1

HCID 21964298(1-Benzyl-5-bromo-1H-indol-2-yl)methanol収率 100%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

反応条件

温度
0 °C

実験手順

To a solution of 6.7 g (19 mmol) of 5-bromo-1-(benzyl)indole-2-carboxylic acid ethyl ester in 25 mL of anhydrous THF at 0° C. were added portionwise 1.42 g (37 mmol) of LiAlH4 and the resulting mixture was stirred at 0° C. for 2 h. After addition of a saturated aqueous solution of NH4Cl and Et2O, the phases were separated and the aqueous one was extracted with Et2O. The combined organic phases were dried over Na2SO4 and evaporated to yield 5.8 g (ca 19 mmol) of [5-bromo-1-(benzyl)-1H-indol-2-yl]-methanol, that was dissolved in 30 mL of CH2Cl2 and treated at 0° C. with 4.75 mL (28 mmol) of DIPEA 7.5 mL (28 mmol) of TIPSOTf. The mixture was stirred at RT for 1 h and added to saturated aqueous NH4Cl and Et2O. The phases were separated and the aqueous one was extracted with Et2O. The combined organic phases were dried over Na2SO4 and evaporated to yield 7.3 g (81%) of 5-bromo-1-(benzyl)-2-triisopropylsilanyloxymethyl-1H-indole, off-white solid, MS: 473 (MH+).

後処理

  1. customthe phases were separated
  2. extractionthe aqueous one was extracted with Et2O
  3. dry with materialThe combined organic phases were dried over Na2SO4
  4. customevaporated

出典と根拠

ORDレコード
ord-227a897fc16942fba4042d558ebc8ef4
出典データセット
uspto-grants-2007_02
特許番号
US07173048B2

反応ノート

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