Triethylamine → 1-(methoxy-methyl-carbamoyl)-3-trifluoromethyl-5,6-dihydro-8H-imidazo[1,5-a]pyrazine-7-carboxylic acid tert-butyl ester

HRID 1895640Notes

Reaction equation

HRID 1895640 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]2[C:14]([C:20]([F:23])([F:22])[F:21])=[N:15][C:16]([C:17]([OH:19])=O)=[C:10]2[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].CO[CH2:26][NH2:27].C(N(CC)CC)C.[O:35]=[C:36]1N(P(Cl)(N2CCOC2=O)=O)CCO1>ClCCl>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]2[C:14]([C:20]([F:21])([F:23])[F:22])=[N:15][C:16]([C:17](=[O:19])[N:27]([O:35][CH3:36])[CH3:26])=[C:10]2[CH2:9]1)=[O:7])([CH3:2])([CH3:4])[CH3:3]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 152842Bis(2-oxo-3-oxazolidinyl)phosphinic chlorideHCID 177781771-MethoxymethanamineHCID 575184537-[(tert-Butoxy)carbonyl]-3-(trifluoromethyl)-5H,6H,7H,8H-imidazo[1,5-a]pyrazine-1-carboxylic acid

Product 1

HCID 575184541-(methoxy-methyl-carbamoyl)-3-trifluoromethyl-5,6-dihydro-8H-imidazo[1,5-a]pyrazine-7-carboxylic acid tert-butyl esterYield 100.9%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

3-Trifluoromethyl-5,6-dihydro-8H-imidazo[1,5-a]pyrazine-1,7-dicarboxylic acid 7-tert-butyl ester 27d (1.84 g, 5.5 mmol) and N-methoxy methyl-amine (0.805 g, 8.25 mmol) were dissolved in 50 mL of dichloromethane under stirring, and triethylamine (3 mL, 22 mmol) and bis(2-oxo-3-oxazolidinyl)phosphinic chloride (2.1 g, 8.25 mmol) were then added to the solution. The reaction mixture was reacted overnight at room temperature and monitored by thin layer chromatography until the disappearance of the starting materials. The reaction mixture was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography to obtain the title compound 1-(methoxy-methyl-carbamoyl)-3-trifluoromethyl-5,6-dihydro-8H-imidazo[1,5-a]pyrazine-7-carboxylic acid tert-butyl ester 27e (2.1 g) as a white solid.

Workup

  1. customThe reaction mixture was reacted overnight at room temperature
  2. concentrationThe reaction mixture was concentrated under reduced pressure
  3. customThe resulting residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-f9be4353822640e5adc7b8cc31762b8d
Source dataset
uspto-grants-2013_08
Patent number
US08513411B2

Reaction notes

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