Hydrochloric Acid → 3-[4-(3-Benzyloxy-5-methyl-phenoxy)-2-methyl-phenyl]-acrylic acid ethyl ester

HRID 1822283

Reaction equation

[CH2:1]([O:8][C:9]1[CH:10]=[C:11]([OH:16])[CH:12]=[C:13]([CH3:15])[CH:14]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH2:17]([O:19][C:20](=[O:31])[CH:21]=[CH:22][C:23]1[CH:28]=[CH:27][C:26](F)=[CH:25][C:24]=1[CH3:30])[CH3:18].C(=O)([O-])[O-].[K+].[K+].Cl>CS(C)=O.CCOCC>[CH2:17]([O:19][C:20](=[O:31])[CH:21]=[CH:22][C:23]1[CH:28]=[CH:27][C:26]([O:16][C:11]2[CH:12]=[C:13]([CH3:15])[CH:14]=[C:9]([O:8][CH2:1][C:2]3[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=3)[CH:10]=2)=[CH:25][C:24]=1[CH3:30])[CH3:18]

Participants

Conditions

Temperature: 130 °C

Procedure

A mixture of 3-benzyloxy-5-methyl-phenol (3.24 g, 15.1 mmol), 3-(4-fluoro-2-methyl-phenyl)-acrylic acid ethyl ester (3.15 g, 15.1 mmol) and 325 mesh potassium carbonate (2.51 g, 18.2 mmol) in dry DMSO (40 mL) is heated to 130° C. and stirred for 20 hours under N2. The reaction is cooled and acidified with 1 N HCl (30 mL). The mixture is then diluted with Et2O and extracted with water. The organic layer is dried (Na2SO4), and the solvent is removed in vacuo to afford crude product that is absorbed on silica gel and purified by flash chromatography using 9/1 hexanes/ethyl acetate to afford 3.56 g (58%) of the title compound. Rf=0.39 (4/1 hexanes/EtOAc). 1H NMR (400 MHz, CDCl3); MS (ES+) m/z mass calculated for C26H26O4 402, found 403 (M+1, 100%).

Workup

temperatureThe reaction is cooled
extractionextracted with water
dry with materialThe organic layer is dried (Na2SO4)
customthe solvent is removed in vacuo
customto afford crude product that
customis absorbed on silica gel
custompurified by flash chromatography

Sources & evidence

ORD record: ord-f68ddca77c1d4435a48459c8f2bbe4d8
Source dataset: uspto-grants-2009_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07608639B2

Linked notes

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