Sodium periodate → 6-(4-Methoxybenzyl)-5-oxo-5,6-dihydropyrido[3,2-e][1,2,4]triazolo[1,5-c]pyrimidine-9-carbaldehyde

HRID 707479

Reaction equation

HRID 707479 reaction equation
[CH3:1][O:2][C:3]1[CH:25]=[CH:24][C:6]([CH2:7][N:8]2[C:13]3[N:14]=[CH:15][C:16]([CH:18]=C)=[CH:17][C:12]=3[C:11]3=[N:20][CH:21]=[N:22][N:10]3[C:9]2=[O:23])=[CH:5][CH:4]=1.I([O-])(=O)(=O)=[O:27].[Na+]>O1CCCC1.O.[Os](=O)(=O)(=O)=O.C(O)(C)(C)C>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]([CH2:7][N:8]2[C:13]3[N:14]=[CH:15][C:16]([CH:18]=[O:27])=[CH:17][C:12]=3[C:11]3=[N:20][CH:21]=[N:22][N:10]3[C:9]2=[O:23])=[CH:24][CH:25]=1

Participants

7

Reactant 2

HCID 23667635Sodium periodateHCID 867053866-(4-methoxybenzyl)-9-vinylpyrido[3,2-e][1,2,4]triazolo[1,5-c]pyrimidin-5(6H)-one

Product 1

HCID 867053916-(4-Methoxybenzyl)-5-oxo-5,6-dihydropyrido[3,2-e][1,2,4]triazolo[1,5-c]pyrimidine-9-carbaldehydeYield 103.5%

Reagents, catalysts & solvents 4

HCID 6386tert-ButanolCatalystHCID 30318Osmium TetroxideCatalystHCID 962WaterSolvent2×HCID 8028TetrahydrofuranSolvent

Procedure

6-(4-Methoxybenzyl)-9-vinylpyrido[3,2-e][1,2,4]triazolo[1,5-c]pyrimidin-5(6H)-one (3.96 g, 11.9 mmol) was suspended in tetrahydrofuran (80 ml) and heated with a heat gun to effect dissolution. Similarly sodium periodate (5.84 g, 27.3 mmol) was heated in water (40 ml) to effect dissolution. The above solutions were combined with vigorous stifling. While the stirred mixture was still at 40° C., osmium(VIII) oxide in tert-butanol (2.90 ml, 2.5%, 0.30 mmol) was added and the mixture was stirred vigorously for 4 hours. It was diluted with water (300 mL) and extracted with ethyl acetate (3×150 mL) and DCM (3×150 mL). The combined extracts were dried (MgSO4) and concentrated to afford 4.13 g (99%) of the title compound as a black solid which was used without further purification. 1H NMR (400 MHz, CDCl3) δ 3.77 (s, 3H), 5.80 (s, 2H), 6.83 (d, J=8.66 Hz, 2H), 7.61 (d, J=8.66 Hz, 2H), 8.41 (s, 1H), 9.10 (d, J=2.13 Hz, 1H), 9.26 (d, J=2.13 Hz, 1H), 10.21 (s, 1H). LCMS (MH+, 336.2).

Workup

  1. temperatureheated with a heat gun
  2. dissolutiondissolution
  3. dissolutiondissolution
  4. customwas still at 40° C.
  5. extractionextracted with ethyl acetate (3×150 mL) and DCM (3×150 mL)
  6. dry with materialThe combined extracts were dried (MgSO4)
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-6116735bc4754c65a58fedad81bf7adc
Source dataset
uspto-grants-2015_11
Patent number
US09175010B2

Linked notes

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