4-Hydroxybenzaldehyde → 4-[((3S)-1-tert-butoxycarbonyl-3-pyrrolidinyl)oxy]benzaldehyde

HRID 53988

Reaction equation

HRID 53988 reaction equation
[OH:1][C:2]1[CH:9]=[CH:8][C:5]([CH:6]=[O:7])=[CH:4][CH:3]=1.[C:10]([O:14][C:15]([N:17]1[CH2:21][CH2:20][C@@H:19](O)[CH2:18]1)=[O:16])([CH3:13])([CH3:12])[CH3:11].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>O1CCCC1>[C:10]([O:14][C:15]([N:17]1[CH2:21][CH2:20][C@H:19]([O:1][C:2]2[CH:9]=[CH:8][C:5]([CH:6]=[O:7])=[CH:4][CH:3]=2)[CH2:18]1)=[O:16])([CH3:13])([CH3:11])[CH3:12]

Participants

6

Reactant 4

HCID 1264-HydroxybenzaldehydeHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 6544479tert-Butyl (3R)-3-hydroxypyrrolidine-1-carboxylate

Product 1

HCID 117790394-[((3S)-1-tert-butoxycarbonyl-3-pyrrolidinyl)oxy]benzaldehydeYield 99.7%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

In 40 ml of tetrahydrofuran were dissolved 1.31 g of p-hydroxybenzaldehyde, 1.87 g of (3R)-1-tert-butoxycarbonyl-3-hydroxypyrrolidine and 2.88 g of triphenylphosphine. With stirring at room temperature, 1.91 g of diethyl azodicarboxylate was added to the thus prepared solution, and the mixture was stirred for 45 minutes. After distilling off the solvent, the resulting residue was purified by subjecting it to silica gel column chromatography using a benzene/ethyl acetate mixture as an elution solvent. In this way, 2.9 g of 4-[((3S)-1-tert-butoxycarbonyl-3-pyrrolidinyl)oxy]benzaldehyde was obtained in an oily form.

Workup

  1. stirringthe mixture was stirred for 45 minutes
  2. distillationAfter distilling off the solvent
  3. customthe resulting residue was purified

Sources & evidence

ORD record
ord-8b25371a6cf241ff8cbc0413b1a5ceab
Source dataset
uspto-grants-1997_04
Patent number
US05620991

Linked notes

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