Methyl 1-(4-hydroxy-3-nitrophenyl)cyclopropanecarboxylate → 1-(3-Amino-4-hydroxy-phenyl)-cyclopropanecarboxylic acid methyl ester

HRID 1847638Notes

Reaction equation

[CH3:1][O:2][C:3]([C:5]1([C:8]2[CH:13]=[CH:12][C:11]([OH:14])=[C:10]([N+:15]([O-])=O)[CH:9]=2)[CH2:7][CH2:6]1)=[O:4]>CO.[Ni]>[CH3:1][O:2][C:3]([C:5]1([C:8]2[CH:13]=[CH:12][C:11]([OH:14])=[C:10]([NH2:15])[CH:9]=2)[CH2:7][CH2:6]1)=[O:4]

Participants

Conditions

Temperature: 35 °C

Procedure

To a solution of 1-(4-hydroxy-3-nitro-phenyl)-cyclopropanecarboxylic acid methyl ester (8.3 g, 35 mmol) in MeOH (100 mL) was added Raney Nickel (0.8 g) under nitrogen atmosphere. The mixture was stirred under hydrogen atmosphere (1 atm) at 35° C. for 8 hours. The catalyst was filtered off through a Celite pad and the filtrate was evaporated under vacuum to give crude product, which was purified by column chromatography on silica gel (petroleum ether/ethyl acetate 1:1) to give 1-(3-amino-4-hydroxy-phenyl)-cyclopropanecarboxylic acid methyl ester (5.3 g, 74%). 1H NMR (CDCl3, 400 MHz) δ 6.77 (s, 1H), 6.64 (d, J=2.0 Hz, 2H), 3.64 (s, 3H), 1.55-1.52 (m, 2H), 1.15-1.12 (m, 2H).

Workup

filtrationThe catalyst was filtered off through a Celite pad
customthe filtrate was evaporated under vacuum
customto give crude product, which
customwas purified by column chromatography on silica gel (petroleum ether/ethyl acetate 1:1)

Sources & evidence

ORD record: ord-def3e6208f904b31a61f929f635def63
Source dataset: uspto-grants-2015_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08952049B2

Reaction notes

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