methyl 2-(4-hydroxyphenoxy)propanoate

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred mixture of 21.6 g (0.11 mol) of 2-(4-hydroxyphenoxy)-propionic acid methyl ester, 15.2 g (0.11 mol) of potassium carbonate, 1.45 g (0.0055 mol) of 18-Crown-6 ether and 100 ml of acetonitrile is added dropwise a solution of 14.95 g (0.10 mol) of 5-chloro-2,3-difluoropyridine in 30 ml of acetonitrile and the mixture is heated at a temperature of 50° to 60° C. during 40 hours. The mixture is then poured into ice/water. The organic material is extracted with ethyl acetate, washed with a saturated salt solution, dried over magnesium sulfate, filtered and evaporated. The oily residue is purified by chromatography over a silica gel column with a hexane/ethyl acetate 3:1 solvent. After evaporation of the solvent one obtain 20.4 g of the above ester (63% of the theory) is obtained in crystalline form. The melting point is 63°-64° C. the mixture is heated at a temperature of 50° to 60° C. during 40 hours The organic material is extracted with ethyl acetate washed with a saturated salt solution dried over magnesium sulfate filtered evaporated The oily residue is purified by chromatography over a silica gel column with a hexane/ethyl acetate 3:1 solvent After evaporation of the solvent one

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Methyl-2-[4-(2-quinolinyloxy)phenoxy]propionate (24) was prepared from 2-chloroquinoline and methyl 2-(4-hydroxyphenoxy)propionate following essentially the same procedure as that described in Example 1. The compound had a melting point of 95°-100° C.

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A stirred mixture of 3,4-difluoronitrobenzene (13.5 g, 0.85 mol), methyl 2-(4-hydroxyphenoxy)-propionate (23.1 g, 0.085 mol), and potassium carbonate (12.5 g, 0.09 mol) in DMSO (200 ml) was heated in an oil bath (120° bath temperature) for one hour. After cooling the reaction mixture was poured into ice water (1000 ml) and the resulting mixture was extracted with ether (3×200 ml). The ether extracts were combined, pentane (200 ml) added, and the resulting solution washed with 5% sodium hydroxide solution (200 ml), then with water. After drying (MgSO4), the solvent was evaporated to give 28 g (98%) of the desired product as a light-yellow oil which solidified upon standing. Recrystallization from hexane-ether gave an analytical sample: m.p.=67.5°-69° C.; Calc: C, 57.31; H, 4.21; N, 4.18. Found: C, 57.00; H, 4.13; N, 4.11. was heated in an oil bath (120° bath temperature) for one hour After cooling the reaction mixture the resulting mixture was extracted with ether (3×200 ml) pentane (200 ml) added the resulting solution washed with 5% sodium hydroxide solution (200 ml) After drying (MgSO4) the solvent was evaporated