Sodium Azide → 3-(1-Methyl-1H-tetrazol-5-yl)-5-nitro-benzoic acid ethyl ester

HRID 2059658Notes

Reaction equation

HRID 2059658 reaction equation
[CH2:1]([O:3][C:4](=[O:18])[C:5]1[CH:14]=[C:13]([N+:15]([O-:17])=[O:16])[CH:12]=[C:7]([C:8]([NH:10][CH3:11])=O)[CH:6]=1)[CH3:2].S(OS(C(F)(F)F)(=O)=O)(C(F)(F)F)(=O)=O.[N-:34]=[N+:35]=[N-:36].[Na+].C([O-])(O)=O.[Na+]>ClC(Cl)C>[CH2:1]([O:3][C:4](=[O:18])[C:5]1[CH:14]=[C:13]([N+:15]([O-:17])=[O:16])[CH:12]=[C:7]([C:8]2[N:10]([CH3:11])[N:36]=[N:35][N:34]=2)[CH:6]=1)[CH3:2]

Participants

6

Reactant 4

HCID 33557Sodium AzideHCID 67749Trifluoromethanesulfonic anhydrideHCID 516892Sodium BicarbonateHCID 47099901N-Methyl-5-nitro-isophthalamic acid ethyl ester

Product 1

HCID 667334013-(1-Methyl-1H-tetrazol-5-yl)-5-nitro-benzoic acid ethyl esterYield 59.1%

Reagents, catalysts & solvents 1

HCID 63651,1-DichloroethaneSolvent

Procedure

To a 2M solution of N-methyl-5-nitro-isophthalamic acid ethyl ester (10 g) in dichloroethane (200 ml) at −20° C. was added pre-cooled triflic anhydride (10 ml) dropwise. This was stirred for 30 min and then sodium azide (4.6 g) was added. This was allowed to warm to room temperature and stirred overnight. The reaction was neutralised with 5% NaHCO3(aq) solution and the organic and aqueous layers were separated and the organic layer dried and concentrated in vacuum. Flash chromatography (100:0 to 50:50 gradient cyclohexane:EtOAc) afforded the title compound (6.5 g). Rt=1.52 min (method D).

Workup

  1. stirringstirred overnight
  2. customthe organic and aqueous layers were separated
  3. customthe organic layer dried
  4. concentrationconcentrated in vacuum

Sources & evidence

ORD record
ord-61b286ced7484420addebac5f536a362
Source dataset
uspto-grants-2012_10
Patent number
US08278302B2

Reaction notes

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