Methyl iodide → 5-Benzyloxy-pyrrolo[2,3-b]pyridine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester

HRID 506757Notes

Reaction equation

HRID 506757 reaction equation
[C:1]([O:5][C:6]([N:8]1[C:12]2=[N:13][CH:14]=[C:15]([O:17][CH2:18][C:19]3[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=3)[CH:16]=[C:11]2[CH:10]=[C:9]1[C:25]([OH:27])=[O:26])=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].[CH3:30]I>CN(C)C=O>[CH3:30][O:26][C:25]([C:9]1[N:8]([C:6]([O:5][C:1]([CH3:4])([CH3:2])[CH3:3])=[O:7])[C:12]2=[N:13][CH:14]=[C:15]([O:17][CH2:18][C:19]3[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=3)[CH:16]=[C:11]2[CH:10]=1)=[O:27]

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 684251515-Benzyloxy-pyrrolo[2,3-b]pyridine-1,2-dicarboxylic acid 1-tert-butyl ester

Product 1

HCID 684233055-Benzyloxy-pyrrolo[2,3-b]pyridine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl esterYield 93%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

The solution of 0.2 g (0.54 mmol) 5-benzyloxy-pyrrolo[2,3-b]pyridine-1,2-dicarboxylic acid 1-tert-butyl ester in 2 ml N,N-dimethylformamide was cooled down to 0° C. and 26 mg (0.54 mmol; 55% dispersion in mineral oil) sodium hydride were added. After 15 min., 38 μl (85 mg, 0.6 mmol) methyl iodide were added and the cooling bath was removed. After 5 hours the reaction mixture was poured on water and was extracted five times with dichloromethane. The organic layers were dried over magnesium sulfate, filtered and evaporated to give 0.19 g (93%) the compound as a light yellow oil which was pure enough for the subsequent steps without further purification.

Workup

  1. customthe cooling bath was removed
  2. additionAfter 5 hours the reaction mixture was poured on water
  3. extractionwas extracted five times with dichloromethane
  4. dry with materialThe organic layers were dried over magnesium sulfate
  5. filtrationfiltered
  6. customevaporated

Sources & evidence

ORD record
ord-474725c86fdf48b2b1ef9805e2d6df6e
Source dataset
uspto-grants-2010_08
Patent number
US07786109B2

Reaction notes

Loading…