4-Hydroxybenzaldehyde → 4-(1-tert-Butoxycarbonylpyrrolidin-3-yloxy)benzaldehyde

HRID 412547Notes

Reaction equation

HRID 412547 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH:10]([OH:13])[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].O[C:15]1[CH:22]=[CH:21][C:18]([CH:19]=[O:20])=[CH:17][CH:16]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>O1CCCC1>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH:10]([O:13][C:15]2[CH:22]=[CH:21][C:18]([CH:19]=[O:20])=[CH:17][CH:16]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 4

HCID 1264-HydroxybenzaldehydeHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 44169391-Boc-3-pyrrolidinol

Product 1

HCID 185365054-(1-tert-Butoxycarbonylpyrrolidin-3-yloxy)benzaldehydeYield 67.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 3-hydroxypyrrolidine-1-carboxylic acid tert-butyl ester (3.07 g), 4-hydroxybenzaldehyde (2 g) and triphenylphosphine (4.51 g) in tetrahydrofuran (50 ml) was added diethyl azodicarboxylate (2.7 ml), and the mixture was stirred at room temperature for 2 hours. After completion of the reaction, the solvent was evaporated and the obtained residue was purified by silica gel column chromatography (hexane:acetone=5:1) and dried under reduced pressure to give the title compound (3.2 g).

Workup

  1. customAfter completion of the reaction
  2. customthe solvent was evaporated
  3. customthe obtained residue was purified by silica gel column chromatography (hexane:acetone=5:1)
  4. customdried under reduced pressure

Sources & evidence

ORD record
ord-49fedf1ae96744f2a794af65cd741eff
Source dataset
uspto-grants-2003_05
Patent number
US06562828B1

Reaction notes

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