Hydrochloric Acid → 1H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(4-hydroxyphenyl)eth enyl)-7-methyl-, (E)-

HRID 375369Notes

Reaction equation

HRID 375369 reaction equation
[CH2:1]([N:3]1[C:12](=[O:13])[C:11]2[N:10]([CH3:14])[C:9](/[CH:15]=[CH:16]/[C:17]3[CH:22]=[CH:21][C:20]([O:23]COC)=[CH:19][CH:18]=3)=[N:8][C:7]=2[N:6]([CH2:27][CH3:28])[C:4]1=[O:5])[CH3:2].Cl.[OH-].[Na+].O>O1CCCC1>[CH2:1]([N:3]1[C:12](=[O:13])[C:11]2[N:10]([CH3:14])[C:9](/[CH:15]=[CH:16]/[C:17]3[CH:18]=[CH:19][C:20]([OH:23])=[CH:21][CH:22]=3)=[N:8][C:7]=2[N:6]([CH2:27][CH3:28])[C:4]1=[O:5])[CH3:2]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 14798Sodium HydroxideHCID 6448921155271-75-3

Product 1

HCID 1356653431H-Purine-2,6-dione, 3,7-dihydro-1,3-diethyl-8-(2-(4-hydroxyphenyl)eth enyl)-7-methyl-, (E)-Yield 98%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Compound 145 (2.70 g, 7.02 mmol) obtained in Reference Example 88 was dissolved in 50 ml of tetrahydrofuran. To the solution was added 17.6 ml of 2N hydrochloric acid, and the mixture was heated under reflux for 2.5 hours. The reaction solution was neutralized with a 2N aqueous solution of sodium hydroxide under ice cooling, water was added thereto, and the deposited crystals were collected by filtration. The obtained crude crystals were recrystallized from 2-propanol to give 2.33 g (yield 98%) of Compound 175 as yellow grains.

Workup

  1. temperaturethe mixture was heated
  2. temperatureunder reflux for 2.5 hours
  3. filtrationthe deposited crystals were collected by filtration
  4. customThe obtained crude crystals
  5. customwere recrystallized from 2-propanol

Sources & evidence

ORD record
ord-81670800680549b6b4777448d0193e8c
Source dataset
uspto-grants-1996_01
Patent number
US05484920

Reaction notes

Loading…