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Triethylamine → 1-(1,1-Dimethylethyl) (2S,4S)-4-(phenylmethyl)-1,2-pyrrolidinedicarboxylate

HRID 851436
Notes
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Reaction equation

HRID 851436 reaction equation
Cl.[CH2:2]([C@@H:9]1[CH2:13][NH:12][C@H:11]([C:14]([OH:16])=[O:15])[CH2:10]1)[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.C(N(CC)CC)C.[C:24]([O:28][C:29](ON=C(C1C=CC=CC=1)C#N)=[O:30])([CH3:27])([CH3:26])[CH3:25]>O.O1CCOCC1>[CH3:25][C:24]([CH3:27])([O:28][C:29]([N:12]1[CH2:13][C@@H:9]([CH2:2][C:3]2[CH:4]=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH2:10][C@H:11]1[C:14]([OH:16])=[O:15])=[O:30])[CH3:26]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 938652-(tert-Butoxycarbonyloxyimino)-2-phenylacetonitrileHCID 70070943HCID 70070943, compound

Product 1

HCID 110121911-(1,1-Dimethylethyl) (2S,4S)-4-(phenylmethyl)-1,2-pyrrolidinedicarboxylate

Reagents, catalysts & solvents 2

HCID 962WaterSolvent2×
HCID 31275
1,4-Dioxane
Solvent

Procedure

To a solution of cis-4-benzyl-L-proline hydrochloride (3 g) and triethylamine (5 g) in water (10 ml) is added a solution of 2-(tert-butoxycarbonyloxyimino)-2-phenylacetonitrile (3.5 g) in dioxane (10 ml). The mixture is stirred at ambient temperature for 4 hours. After the addition of water (30 ml), and washing with ether, the mixture is acidified to a pH of 3-4 with 10% citric acid. The oil that separates is extracted into ethyl acetate, washed with brine, and dried (MgSO4). After concentration in vacuo, the residue (3.7 g) solidifies at room temperature, melting point 145°-149° C. dec.

Workup

  1. washwashing with ether
  2. extractionThe oil that separates is extracted into ethyl acetate
  3. washwashed with brine
  4. dry with materialdried (MgSO4)
  5. concentrationAfter concentration in vacuo
  6. customsolidifies at room temperature

Sources & evidence

ORD record
ord-c46ffd06d6b64374af54e0f6fe51eda1
Source dataset
uspto-grants-1983_05
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US04384123

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes