5-fluoro-2-methylbenzenethiol

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

Procedure: In an open flask cuprous oxide (500 mg., 3.5 mmoles) and 2-methyl-5-fluorothiophenol (1.0 g., 7 mmoles) were combined in 35 ml. of dimethylformamide and heated in an oil bath at 135°-140° C. for 2.5 hours. The mixture was cooled slightly, 5-bromofuran-3-carboxylic acid (668 mg., 3.5 mmoles) was added and the mixture refluxed for approximately 16 hours. Crude product was isolated according to Example 16. The resulting oil was crystallized by trituration with water (170 mg.). Recrystallization from methanol/water gave purified 5-(2-methyl-5-fluorophenylthio)furan-3-carboxylic acid (125 mg., m.p. 150°-152° C., m/e 252). The mixture was cooled slightly the mixture refluxed for approximately 16 hours Crude product was isolated The resulting oil was crystallized by trituration with water (170 mg.) Recrystallization from methanol/water gave purified 5-(2-methyl-5-fluorophenylthio)furan-3-carboxylic acid (125 mg., m.p. 150°-152° C., m/e 252)

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

Procedure: In an open flask cuprous oxide (500 mg., 3.5 mmoles) and 2-methyl-5-fluorothiophenol (1.0 g., 7 mmoles) were combined in 35 ml. of dimethylformamide and heated in an oil bath at 135°-140° C. for 2.5 hours. The mixture was cooled slightly, 5-bromofuran-3-carboxylic acid (668 mg., 3.5 mmoles) was added and the mixture refluxed for approximately 16 hours. Crude product was isolated according to Example 16. The resulting oil was crystallized by trituration with water (170 mg.). Recrystallization from methanol/water gave purified 5-(2-methyl-5-fluorophenylthio)furan-3-carboxylic acid (125 mg., m.p. 150°-152° C., m/e 252). The mixture was cooled slightly the mixture refluxed for approximately 16 hours Crude product was isolated The resulting oil was crystallized by trituration with water (170 mg.) Recrystallization from methanol/water gave purified 5-(2-methyl-5-fluorophenylthio)furan-3-carboxylic acid (125 mg., m.p. 150°-152° C., m/e 252)