Phthalimide → 2-(1-Benzyl-3-methoxymethylpyrrolidin-3-ylmethyl)isoindole-1,3-dione

HRID 729443Notes

Reaction equation

HRID 729443 reaction equation
[CH2:1]([N:8]1[CH2:12][CH2:11][C:10]([CH2:16]O)([CH2:13][O:14][CH3:15])[CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[C:37]1(=[O:47])[NH:41][C:40](=[O:42])[C:39]2=[CH:43][CH:44]=[CH:45][CH:46]=[C:38]12.N(C(OCC)=O)=NC(OCC)=O>O1CCCC1>[CH2:1]([N:8]1[CH2:12][CH2:11][C:10]([CH2:16][N:41]2[C:37](=[O:47])[C:38]3[C:39](=[CH:43][CH:44]=[CH:45][CH:46]=3)[C:40]2=[O:42])([CH2:13][O:14][CH3:15])[CH2:9]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 6809PhthalimideHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 21979083(1-Benzyl-3-methoxymethylpyrrolidin-3-yl)methanol

Product 1

HCID 578326372-(1-Benzyl-3-methoxymethylpyrrolidin-3-ylmethyl)isoindole-1,3-dioneYield 21.9%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A solution of (1-benzyl-3-methoxymethylpyrrolidin-3-yl)methanol (Example A19, 1.71 g, 7.27 mmol), triphenylphosphine (2.16 g, 8.22 mmol), phthalimide (1.14 g, 7.73 mmol), and anhydrous tetrahydrofuran is cooled to 0° C. and treated with diethyl azodicarboxylate (1.62 g, 9.31 mmol). The resulting mixture is stirred at room temperature for 18 hours and concentrated under vacuum. The residue is purified by flash column chromatography (1:5 ethyl acetate/hexanes) to afford the title compound, (0.58 g) as a solid. 1H NMR (200 MHz, CDCl3): δ 7.91-7.80 (m, 2H), 7.78-7.66 (m, 2H), 7.39-7.11 (m, 5H), 3.95-3.72 (m, 2H), 3.65-3.40 (m, 2H), 3.31 (s, 2H), 3.27 (s, 3H), 2.72-2.34 (m, 4H), 2.02-1.82 (m, 1H), 1.76-1.56 (m, 1H). MS ES: m/z 365 (MH+).

Workup

  1. customis cooled to 0° C.
  2. concentrationconcentrated under vacuum
  3. customThe residue is purified by flash column chromatography (1:5 ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-c70012a30c4d46d0b299918c255e5ae2
Source dataset
uspto-grants-2009_09
Patent number
US07582627B2

Reaction notes

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