Hydrochloric Acid → 2-Amino-6-methyl-4-oxo-4H-pyran-3-carbonitrile

HRID 2206478Notes

Reaction equation

HRID 2206478 reaction equation
[C:1](#[N:5])[CH2:2][C:3]#[N:4].[H-].[Na+].[CH2:8]=[C:9]1[O:13][C:11](=[O:12])[CH2:10]1.Cl>O1CCCC1>[NH2:4][C:3]1[O:13][C:9]([CH3:8])=[CH:10][C:11](=[O:12])[C:2]=1[C:1]#[N:5]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 8010MalononitrileHCID 12661DiketeneHCID 24758Sodium hydride

Product 1

HCID 114805352-Amino-6-methyl-4-oxo-4H-pyran-3-carbonitrileYield 80%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of malononitrile (3.3 g, 50 mmol) in anhydrous tetrahydrofuran (100 mL) was added sodium hydride (60% w/w, 2.2 g, 55 mmol) at −10° C. The resultant mixture was stirred for 2 hours. Then diketene (4.2 g, 50 mmol) was added dropwise to the solution. The mixture was allowed to warm to room temperature and continued stirring for 30 minutes. The mixture was neutralized with hydrochloric acid and then concentrated in vacuo to give crude 2-amino-6-methyl-4-oxo-4H-pyran-3-carbonitrile (6.0 g, 80%) as a red solid, which was used in the next step without further purification.

Workup

  1. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-8b6ee60de6154481932c2bb49bbe8b5a
Source dataset
uspto-grants-2016_06
Patent number
US09371331B2

Reaction notes

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