Ethanol → tert-butyl 2-(4-amino-3-(4,5-dihydro-1H-imidazol-2-yl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)acetate

HRID 1842847Notes

Reaction equation

HRID 1842847 reaction equation
[C:1]([O:5][C:6](=[O:20])[CH2:7][N:8]1[C:12]2=[N:13][CH:14]=[N:15][C:16]([NH2:17])=[C:11]2[C:10]([C:18]#[N:19])=[N:9]1)([CH3:4])([CH3:3])[CH3:2].CCO.[CH2:24](N)[CH2:25][NH2:26]>C(O)(=O)C>[NH2:17][C:16]1[N:15]=[CH:14][N:13]=[C:12]2[N:8]([CH2:7][C:6]([O:5][C:1]([CH3:4])([CH3:2])[CH3:3])=[O:20])[N:9]=[C:10]([C:18]3[NH:26][CH2:25][CH2:24][N:19]=3)[C:11]=12

Participants

5

Reactant 3

HCID 702EthanolHCID 3301EthylenediamineHCID 59242680(4-Amino-3-cyano-pyrazolo[3,4-d]pyrimidin-1-yl)-acetic acid tert-butyl ester

Product 1

HCID 59242681tert-butyl 2-(4-amino-3-(4,5-dihydro-1H-imidazol-2-yl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)acetateYield 90%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

To a mixture of (4-amino-3-cyano-pyrazolo[3,4-d]pyrimidin-1-yl)-acetic acid tert-butyl ester (80 g, 0.291 mol) and EtOH (800 mL) in an ice water bath was added acetic acid (67 mL) and then ethylenediamine (195 mL). The resulting mixture was refluxed for 90 min, cooled to room temperature and filtered. The solid was suspended in water (1 L), filtered and dried in vacuo to give of tert-butyl 2-(4-amino-3-(4,5-dihydro-1H-imidazol-2-yl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)acetate (84.6 g, 90% yield). MS (ES) m/z 318.1 (M+H+).

Workup

  1. temperatureThe resulting mixture was refluxed for 90 min
  2. filtrationfiltered
  3. filtrationfiltered
  4. customdried in vacuo

Sources & evidence

ORD record
ord-d30c18e7a2ac421e9fe98727a7c9ec22
Source dataset
uspto-grants-2015_02
Patent number
US08946240B2

Reaction notes

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