Hydrochloric Acid → 1-(3-Hydroxymethyl-4-methoxy-phenyl)-cyclopropanecarboxylic acid methyl ester

HRID 1008789Notes

Reaction equation

[CH3:1][O:2][C:3]([C:5]1([C:8]2[CH:13]=[CH:12][C:11]([O:14][CH3:15])=[C:10]([CH2:16]Cl)[CH:9]=2)[CH2:7][CH2:6]1)=[O:4].C([O-])([O-])=[O:19].[Na+].[Na+].Cl>O.[N+](CCCC)(CCCC)(CCCC)CCCC.[Br-]>[CH3:1][O:2][C:3]([C:5]1([C:8]2[CH:13]=[CH:12][C:11]([O:14][CH3:15])=[C:10]([CH2:16][OH:19])[CH:9]=2)[CH2:7][CH2:6]1)=[O:4]

Participants

Conditions

Temperature: 65 °C

Procedure

To a suspension of crude 1-(3-chloromethyl-4-methoxy-phenyl)-cyclopropanecarboxylic acid methyl ester (20.0 g) in water (350 mL) was added Bu4NBr (4.0 g) and Na2CO3 (90.0 g, 0.85 mol) at room temperature. The reaction mixture was heated at 65° C. overnight. The resulting solution was acidified with aq. HCl (2 mol/L) and extracted with EtOAc (200 mL×3). The organic layer was washed with brine, dried over anhydrous Na2SO4 and evaporated under vacuum to give crude product, which was purified by column (Petroleum Ether/EtOAc 15:1) to give 1-(3-hydroxymethyl-4-methoxy-phenyl)-cyclopropanecarboxylic acid methyl ester (8.0 g, 39%). 1H NMR (CDCl3, 400 MHz) δ 7.23-7.26 (m, 2 H), 6.83 (d, J=8.0 Hz, 1 H), 4.67 (s, 2 H), 3.86 (s, 3 H), 3.62 (s, 3 H), 1.58 (q, J=3.6 Hz, 2 H), 1.14-1.17 (m, 2 H).

Workup

extractionextracted with EtOAc (200 mL×3)
washThe organic layer was washed with brine
dry with materialdried over anhydrous Na2SO4
customevaporated under vacuum
customto give crude product, which
customwas purified by column (Petroleum Ether/EtOAc 15:1)

Sources & evidence

ORD record: ord-da1940be5e394426b613e8a80f6c9007
Source dataset: uspto-grants-2011_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07973038B2

Reaction notes

Loading…