4-[7-(2-Butynyl)-1,3-bis-(2,2-dimethylpropionyloxymethyl)-2,6-dioxo 2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylic acid tert-butyl ester → 4-[7-(2-Butynyl)-1-(2,2-dimethylpropionyloxymethyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylic acid tert-butyl ester

HRID 1792065Notes

Reaction equation

HRID 1792065 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[N:22]([CH2:23][C:24]#[C:25][CH3:26])[C:21]3[C:20](=[O:27])[N:19]([CH2:28][O:29][C:30](=[O:35])[C:31]([CH3:34])([CH3:33])[CH3:32])[C:18](=[O:36])[N:17](COC(=O)C(C)(C)C)[C:16]=3[N:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]>O1CCCC1.CO.C12CCCCC1CCCNN=2>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[N:22]([CH2:23][C:24]#[C:25][CH3:26])[C:21]3[C:20](=[O:27])[N:19]([CH2:28][O:29][C:30](=[O:35])[C:31]([CH3:34])([CH3:33])[CH3:32])[C:18](=[O:36])[NH:17][C:16]=3[N:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:3])([CH3:2])[CH3:4]

Participants

5

Reactant 1

HCID 235369404-[7-(2-Butynyl)-1,3-bis-(2,2-dimethylpropionyloxymethyl)-2,6-dioxo 2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylic acid tert-butyl ester

Product 1

HCID 230818944-[7-(2-Butynyl)-1-(2,2-dimethylpropionyloxymethyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylic acid tert-butyl esterYield 56.5%

Reagents, catalysts & solvents 3

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolventHCID 66879275Diazabicyclo[5.4.0]undeceneSolvent

Procedure

4-[7-(2-Butynyl)-1,3-bis-(2,2-dimethylpropionyloxymethyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylic acid tert-butyl ester (0.63 g) was dissolved in a solvent mixture of tetrahydrofuran (4 ml) and methanol (2 ml), and diazabicyclo[5.4.0]undecene (0.18 ml) was added to the solution. The mixture was stirred at room temperature overnight. The reaction mixture was concentrated, and the residue was purified by silica gel column chromatography to give 0.29 g of the title compound from the elution fraction of hexane-ethyl acetate (1:5).

Workup

  1. additionwas added to the solution
  2. concentrationThe reaction mixture was concentrated
  3. customthe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-bda9e784fbac450ea84836ed4967b311
Source dataset
uspto-grants-2006_07
Patent number
US07074798B2

Reaction notes

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