Acetic Acid → tert-Butyl [3-({5-amino-2-[(tert-butoxycarbonyl)amino]phenyl}ethynyl)phenyl]carbamate

HRID 541896Notes

Reaction equation

[C:1]([O:5][C:6]([NH:8][C:9]1[CH:14]=[CH:13][C:12]([N+:15]([O-])=O)=[CH:11][C:10]=1[C:18]#[C:19][C:20]1[CH:21]=[C:22]([NH:26][C:27](=[O:33])[O:28][C:29]([CH3:32])([CH3:31])[CH3:30])[CH:23]=[CH:24][CH:25]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].CO.C(O)(=O)C>[Fe].O>[NH2:15][C:12]1[CH:13]=[CH:14][C:9]([NH:8][C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:7])=[C:10]([C:18]#[C:19][C:20]2[CH:21]=[C:22]([NH:26][C:27](=[O:33])[O:28][C:29]([CH3:32])([CH3:31])[CH3:30])[CH:23]=[CH:24][CH:25]=2)[CH:11]=1

Participants

Conditions

Temperature: 60 °C

Procedure

Into the reaction flask was added tert-butyl [3-({2-[(tert-butoxycarbonyl)amino]-5-nitrophenyl}ethynyl)phenyl]carbamate (2.7 g, 6.0 mmol), methanol (70 mL), acetic acid (10 mL), and water (7 mL). Then iron powder (1.8 g, 30 mmol) was added. The reaction mixture was heated at 60° C. for 3 h. After filtration, the cake was rinsed with EtOAc. The filtrate was concentrated and the residue was diluted with NaHCO3 (aq) and EtOAc. After the layers were separated, the organic layer was dried, filtered and concentrated to give the desired product (2.3 g, 91%). LCMS for C24H30N3O4 (M+H)+: m/z=424.2.

Workup

filtrationAfter filtration
washthe cake was rinsed with EtOAc
concentrationThe filtrate was concentrated
additionthe residue was diluted with NaHCO3 (aq) and EtOAc
customAfter the layers were separated
customthe organic layer was dried
filtrationfiltered
concentrationconcentrated

Sources & evidence

ORD record: ord-f6c9b5dca0de4f5bbb380091433aebc6
Source dataset: uspto-grants-2014_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08871753B2

Reaction notes

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