Potassium Carbonate → [2-(7-cyanomethoxy-1H-indol-3-yl)-1,1-dimethyl-ethyl]-carbamic acid tert-butyl ester

HRID 1272216Notes

Reaction equation

HRID 1272216 reaction equation
[C:1]([O:5][C:6](=[O:22])[NH:7][C:8]([CH3:21])([CH3:20])[CH2:9][C:10]1[C:18]2[C:13](=[C:14]([OH:19])[CH:15]=[CH:16][CH:17]=2)[NH:12][CH:11]=1)([CH3:4])([CH3:3])[CH3:2].Br[CH2:24][C:25]#[N:26].C([O-])([O-])=O.[K+].[K+]>CC(=O)CC>[C:1]([O:5][C:6](=[O:22])[NH:7][C:8]([CH3:21])([CH3:20])[CH2:9][C:10]1[C:18]2[C:13](=[C:14]([O:19][CH2:24][C:25]#[N:26])[CH:15]=[CH:16][CH:17]=2)[NH:12][CH:11]=1)([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 11534BromoacetonitrileHCID 69519112[2-(7-hydroxy-1H-indol-3-yl)-1,1-dimethyl-ethyl]-carbamic acid tert-butyl ester

Product 1

HCID 69516800[2-(7-cyanomethoxy-1H-indol-3-yl)-1,1-dimethyl-ethyl]-carbamic acid tert-butyl esterYield 86.5%

Reagents, catalysts & solvents 1

HCID 6569Methyl Ethyl KetoneSolvent

Procedure

A mixture of [2-(7-hydroxy-1H-indol-3-yl)-1,1-dimethyl-ethyl]-carbamic acid tert-butyl ester (15.55 g, 51.1 mmol), bromoacetonitrile (10.7 mL, 153 mmol), K2CO3 (17.78 g, 128.6 mmol) and 2-butanone is heated to reflux. After 1 hour the mixture is allowed to cool and is filtered through celite. The filtrate is concentrated to an oil which is purified by flash chromatography with CH2Cl2 followed by 5% ethyl acetate/CH2Cl2 to give 15.18 g of [2-(7-cyanomethoxy-1H-indol-3-yl)-1,1-dimethyl-ethyl]-carbamic acid tert-butyl ester (86%). MS (ES−) m/z 342.

Workup

  1. temperatureis heated to reflux
  2. temperatureto cool
  3. filtrationis filtered through celite
  4. concentrationThe filtrate is concentrated to an oil which
  5. customis purified by flash chromatography with CH2Cl2

Sources & evidence

ORD record
ord-cb5e15b2a9b343c98a299ba51802a753
Source dataset
uspto-grants-2007_04
Patent number
US07208505B2

Reaction notes

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