Sodium Iodide → 6-Iodo-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-amine

HRID 657681Notes

Reaction equation

HRID 657681 reaction equation
[CH3:1][C:2]1[CH:7]=[C:6]([NH2:8])[N:5]2[N:9]=[CH:10][N:11]=[C:4]2[N:3]=1.[Na+].[I-:13].CC1C=CC(S([N-]Cl)(=O)=O)=CC=1.O.O.O.[Na+]>C(O)(=O)C>[I:13][C:7]1[C:2]([CH3:1])=[N:3][C:4]2[N:5]([N:9]=[CH:10][N:11]=2)[C:6]=1[NH2:8]

Participants

5

Reactant 3

HCID 5238Sodium IodideHCID 1695055-Methyl(1,2,4)triazolo(1,5-a)pyrimidin-7-amineHCID 517414chloramine-T trihydrate

Product 1

HCID 667428896-Iodo-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-amineYield 88%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

To a stirring mixture of 3:05 g (20.4 mmol) of 5-methyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine (prepared as described in Kano; Makisumi; Chem. Pharm. Bull.; 6; 1958; 583, 585) in 50 mL of acetic acid at room temperature was added NaI (3.2 g, 21.5 mmol). Chloramine-T trihydrate (6.0 g, 21.5 mmol) was then added portion wise. The resulting mixture was then stirred for 1 h at room temperature. Most of the organic solvent was removed on a rotavap. The mixture was taken up in 40 mL of CH3CN and filtered. The solid collected was washed with diethyl ether and dried in vacuum oven to give the title compound as a light yellow solid (4.93 g, 88% yield).

Workup

  1. customMost of the organic solvent was removed on a rotavap
  2. filtrationfiltered
  3. customThe solid collected
  4. washwas washed with diethyl ether
  5. customdried in vacuum oven

Sources & evidence

ORD record
ord-a007f4c41d234b6b9c4f6c9e512cfbd7
Source dataset
uspto-grants-2011_12
Patent number
US08076344B2

Reaction notes

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