3-(4-PROPOXYPHENYL)PROPIONIC ACID synthesis

5synthesis methods

Product Name:3-(4-PROPOXYPHENYL)PROPIONIC ACID
CAS Number:3243-40-1
Molecular formula:C12H16O3
Molecular Weight:208.25

Ethanamine, N-[(3,5-dichlorophenyl)methylene]-2,2-diethoxy-

1000210-73-0
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3243-40-1
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Yield: 82%

Reaction Conditions:

with sodium hydroxide;water in tetrahydrofuran at 20;

Steps:

60.1
To a solution of methyl 3-(hydroxyphenyl) propionate (15 g, 83.24 mmol) and iodopropane (12.14 mL, 124.5 mmol) in DMF (80 mL) was added K2CO3 (34 g, 249.7 mmol). The resultant slurry was stirred vigorously and heated to 60 C under argon for 12h. DMF was evaporated and residue partitioned between EtOAC and 1 N HCI. The organic layer was washed with H2O, and brine then dried over NA2SO4. The solvent was removed in vacuo and the residue was purified by flash column chromatography (10% EtOAc in hexanes) to provide the desired product (17 g, 98%) as a clear oil. The resultat oil was dissolved in THF (150 mL), and 2M NAOH (68 mL) was added. The reaction was stirred overnight at room temperature. THF was evaporated and residue acidified with concentrated HCI and extracted 3 times with EtOAC (100 mL). The organic layer was washed with H2O, dried over NA2SO4 and concentrated to a white solid which was recrystalized from hexanes to provide the desired product (14.06 g 82%). IHNMR (CDCI3) 6 : 1.04 (t, J=7. 2,3H), 1.76-1. 85 (m, 2H), 2.64 (t, J= 8.1, 2H), 2.90 (t, J= 8.1, 2H), 3.89 (t, J = 6.6, 2H), 6.82 (d, J = 8.6, 2H), 7.10 (d, J = 8.6, 2H).

References:

PFIZER INC. WO2004/74270, 2004, A2 Location in patent:Page 90

69033-81-4 Synthesis