N-Hydroxyphthalimide → Benzyl (2-((1,3-dioxoisoindolin-2-yl)oxy)ethyl)carbamate

HRID 1067010Notes

Reaction equation

HRID 1067010 reaction equation
[OH:1][CH2:2][CH2:3][NH:4][C:5](=[O:14])[O:6][CH2:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1.O[N:16]1[C:20](=[O:21])[C:19]2=[CH:22][CH:23]=[CH:24][CH:25]=[C:18]2[C:17]1=[O:26].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>O1CCCC1.C(OCC)(=O)C>[CH2:7]([O:6][C:5]([NH:4][CH2:3][CH2:2][O:1][N:16]1[C:17](=[O:26])[C:18]2=[CH:25][CH:24]=[CH:23][CH:22]=[C:19]2[C:20]1=[O:21])=[O:14])[C:8]1[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=1

Participants

7

Reactant 4

HCID 10665N-HydroxyphthalimideHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 280458benzyl N-(2-hydroxyethyl)carbamate

Product 1

HCID 13983475Benzyl (2-((1,3-dioxoisoindolin-2-yl)oxy)ethyl)carbamateYield 91.1%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of benzyl N-(2-hydroxyethyl)carbamate (5.9 g, 30 mmol), N-hydroxyphthalimide (4.9 g, 30 mmol), and triphenylphosphine (7.9 g, 30 mmol) in tetrahydrofuran (100 mL) was added diethyl azodicarboxylate (5.2 g, 30 mmol). The reaction mixture was stirred at room temperature overnight. Ethyl acetate (200 mL) was added, the solution washed with saturated NaHCO3 (2×100 mL) and brine (100 mL), and dried over Na2SO4. After evaporating the solvent, the residue was purified by flash column chromatography (methylene chloride to 4% ethyl acetate in methylene chloride) to give the title compound as a white solid (9.3 g, 91%). 1H-NMR (300 MHz, CDCl3) δ7.84 (m, 2H), 7.78 (m, 2H), 7.37 (m, SH), 5.97 (br s, 1H), 5.14 (s, 2H), 4.27 (t, J=4.9 Hz, 2H), 3.51 (q, J=5.2 Hz, 2H).

Workup

  1. washthe solution washed with saturated NaHCO3 (2×100 mL) and brine (100 mL)
  2. dry with materialdried over Na2SO4
  3. customAfter evaporating the solvent
  4. customthe residue was purified by flash column chromatography (methylene chloride to 4% ethyl acetate in methylene chloride)

Sources & evidence

ORD record
ord-1a0d283b7e384eb3bc3196bc4ccab918
Source dataset
uspto-grants-2001_06
Patent number
US06245763B1

Reaction notes

Loading…