Benzyl-{2-[4-(4-nitro-phenoxy)-phenyl]-ethyl}-carbamic acid tert-butyl ester → {2-[4-(4-Amino-phenoxy)-phenyl]-ethyl}-benzyl-carbamic acid tert-butyl ester

HRID 2197643Notes

Reaction equation

HRID 2197643 reaction equation
[C:1]([O:5][C:6](=[O:33])[N:7]([CH2:26][C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)[CH2:8][CH2:9][C:10]1[CH:15]=[CH:14][C:13]([O:16][C:17]2[CH:22]=[CH:21][C:20]([N+:23]([O-])=O)=[CH:19][CH:18]=2)=[CH:12][CH:11]=1)([CH3:4])([CH3:3])[CH3:2]>[Pd].CO>[C:1]([O:5][C:6](=[O:33])[N:7]([CH2:8][CH2:9][C:10]1[CH:11]=[CH:12][C:13]([O:16][C:17]2[CH:22]=[CH:21][C:20]([NH2:23])=[CH:19][CH:18]=2)=[CH:14][CH:15]=1)[CH2:26][C:27]1[CH:28]=[CH:29][CH:30]=[CH:31][CH:32]=1)([CH3:4])([CH3:2])[CH3:3]

Participants

4

Reactant 1

HCID 59717858Benzyl-{2-[4-(4-nitro-phenoxy)-phenyl]-ethyl}-carbamic acid tert-butyl ester

Product 1

HCID 59717849{2-[4-(4-Amino-phenoxy)-phenyl]-ethyl}-benzyl-carbamic acid tert-butyl esterYield 98.6%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent

Procedure

Combine benzyl-{2-[4-(4-nitro-phenoxy)-phenyl]-ethyl}-carbamic acid tert-butyl ester (2.5 g), 5% Pd/C (200 mg), and methanol (100 mL) then hydrogenated at 40 PSIG at room temperature for 2 hours. Filter off catalyst then concentrate on a rotary evaporator to yield {2-[4-(4-amino-phenoxy)-phenyl]-ethyl}-benzyl-carbamic acid tert-butyl ester (2.3 g): 1H NMR (CDCl3, 300.00 MHz): 7.42-6.70 (m, 13H), 4.41 (m, 2H), 3.39 (m, 2H), 2.77 (m, 2H), 1.52 (s, 9H).

Workup

  1. filtrationFilter off catalyst
  2. concentrationthen concentrate on a rotary evaporator

Sources & evidence

ORD record
ord-ed4a64dd82d049008ffc3a12095c6f63
Source dataset
uspto-grants-2012_12
Patent number
US08338611B2

Reaction notes

Loading…