Pyrrolidine → 3-Methyl-3-(pyrrolidine-1-carbonyl)pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 1945495Notes

Reaction equation

HRID 1945495 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][C:10]([CH3:16])([C:13]([OH:15])=O)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].CC[N:19]([CH:23]([CH3:25])C)[CH:20]([CH3:22])C.N1CCCC1.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>CN(C=O)C>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][C:10]([CH3:16])([C:13]([N:19]2[CH2:20][CH2:22][CH2:25][CH2:23]2)=[O:15])[CH2:9]1)=[O:7])([CH3:2])([CH3:3])[CH3:4]

Participants

6

Reactant 4

HCID 31268PyrrolidineHCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 532554551-((Tert-butoxy)carbonyl)-3-methylpyrrolidine-3-carboxylic acid

Product 1

HCID 596056303-Methyl-3-(pyrrolidine-1-carbonyl)pyrrolidine-1-carboxylic acid tert-butyl esterYield 78%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 3-methylpyrrolidine-1,3-dicarboxylic acid 1-tert-butyl ester (348 mg, 1.52 mmol) in DMF (10 mL) were added DIPEA (0.53 mL, 3.04 mmol), pyrrolidine (0.25 mL, 3.04 mmol) and HATU (693 mg, 1.82 mmol). The reaction mixture was stirred at room temperature for 18 hours and then partitioned between water and EtOAc. The organic layer was separated and washed with a 0.1N aqueous HCl solution and brine, dried over Na2SO4, filtered and concentrated to give the desired product as a white solid (334 mg, 78%). 1H NMR (400 MHz, CHCl3-d): δ 3.61-3.38 (m, 8 H); 2.00-1.79 (m, 6 H); 1.47-1.44 (m, 9 H); 1.33 (s, 3 H).

Workup

  1. custompartitioned between water and EtOAc
  2. customThe organic layer was separated
  3. washwashed with a 0.1N aqueous HCl solution and brine
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-a67c47f3342f461b81b7ac7e9abc75bb
Source dataset
uspto-grants-2013_03
Patent number
US08394796B2

Reaction notes

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