Ammonium Chloride → HCID 178438391, compound

HRID 904521Notes

Reaction equation

HRID 904521 reaction equation
[CH3:1][CH:2]([C:4]1[S:19][C:7]2[N:8]=[C:9]3[CH:16]=[CH:15][C:14]([C:17]#[N:18])=[CH:13][N:10]3[C:11](=[O:12])[C:6]=2[CH:5]=1)[CH3:3].[N-:20]=[N+:21]=[N-:22].[Na+].[Cl-].[NH4+]>CN(C)C=O>[CH3:3][CH:2]([C:4]1[S:19][C:7]2[N:8]=[C:9]3[CH:16]=[CH:15][C:14]([C:17]4[NH:22][N:21]=[N:20][N:18]=4)=[CH:13][N:10]3[C:11](=[O:12])[C:6]=2[CH:5]=1)[CH3:1]

Participants

5

Reactant 3

HCID 25517Ammonium ChlorideHCID 33557Sodium AzideHCID 12862372HCID 12862372, compound

Product 1

HCID 178438391HCID 178438391, compoundYield 55.8%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
124 °C

Procedure

A mixture of 5.1 g (0.01894 mol) of 2-(1-methylethyl)-4-oxo-4H-pyrido[1,2-a]thieno[2,3-d]pyrimidine-7-carbonitrile (Example 16), 6.5 g (0.1 mol) of sodium azide and 5.35 g (0.1 mol) of ammonium chloride in 150 ml of dimethylformamide is stirred and heated at 124° C. for twenty-two hours under nitrogen. The reaction mixture is cooled, filtered and the filtrate evaporated. The residue is treated with 1 l water and acidified with concentrated hydrochloric acid. The resulting precipitate is collected, suspended in hot water, the suspension cooled and filtered to give 3.3 g of 2-(1-methylethyl)-7-(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]thieno[2,3-d]pyrimidin-4-one; mp 288° C. (dec) after recrystallization from pyridine-ethanol.

Workup

  1. temperatureThe reaction mixture is cooled
  2. filtrationfiltered
  3. customthe filtrate evaporated
  4. additionThe residue is treated with 1 l water
  5. customThe resulting precipitate is collected
  6. temperaturethe suspension cooled
  7. filtrationfiltered

Sources & evidence

ORD record
ord-bfca4609d701461db74ab58375d60240
Source dataset
uspto-grants-1980_10
Patent number
US04230707

Reaction notes

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