Methyl chloroformate → Dimethyl 2-(2-fluoro-4-(trifluoromethyl)phenyl)piperidine-1,4-dicarboxylate

HRID 1963221Notes

Reaction equation

HRID 1963221 reaction equation
Cl.[F:2][C:3]1[CH:8]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:6]=[CH:5][C:4]=1[CH:13]1[CH2:18][CH:17]([C:19]([O:21][CH3:22])=[O:20])[CH2:16][CH2:15][NH:14]1.CCN(C(C)C)C(C)C.[C:32](Cl)(=[O:35])[O:33][CH3:34]>C(Cl)Cl>[F:2][C:3]1[CH:8]=[C:7]([C:9]([F:12])([F:10])[F:11])[CH:6]=[CH:5][C:4]=1[CH:13]1[CH2:18][CH:17]([C:19]([O:21][CH3:22])=[O:20])[CH2:16][CH2:15][N:14]1[C:32]([O:33][CH3:34])=[O:35]

Participants

5

Reactant 3

HCID 6586Methyl chloroformateHCID 81531DiisopropylethylamineHCID 66731513Methyl 2-(2-fluoro-4-(trifluoromethyl)phenyl)piperidine-4-carboxylate hydrochloride

Product 1

HCID 66735134Dimethyl 2-(2-fluoro-4-(trifluoromethyl)phenyl)piperidine-1,4-dicarboxylateYield 91.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Methyl 2-(2-fluoro-4-(trifluoromethyl)phenyl)piperidine-4-carboxylate hydrochloride (5.50 g, 16.09 mmol) was dissolved in DCM (100 mL), then DIPEA (7.03 mL, 40.23 mmol) was added. Methyl carbonochloridate (1.774 mL, 22.53 mmol) was added dropwise to the solution. The mixture was stirred at room temperature for 4 h. The mixture was washed with 0.1 M HCl (100 mL) and satd NaHCO3 (100 mL), then dried through a phase-separator and evaporated yielding dimethyl 2-(2-fluoro-4-(trifluoromethyl)phenyl)piperidine-1,4-dicarboxylate (5.33 g, 91%) as a brown oil.

Workup

  1. washThe mixture was washed with 0.1 M HCl (100 mL) and satd NaHCO3 (100 mL)
  2. customdried through a phase-separator
  3. customevaporated

Sources & evidence

ORD record
ord-5db47f7be56140429c7ff8341dc2482f
Source dataset
uspto-grants-2013_04
Patent number
US08415378B2

Reaction notes

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