1,2-diethoxybenzene

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 15.0 g of 2-ethoxyphenol, 18.0 ml of iodoethane and 30.0 g of potassium carbonate were suspended in 150 ml dimethylformamide, and the mixture was stirred at 80° C. for 30 hours. Ethyl acetate was added thereto, and the mixture was washed with water for five times and with brine, and then dried over anhydrous magnesium sulfate. The solvent was evaporated to give the title compound quantitatively as a red-brown oil. the mixture was washed with water for five times and with brine dried over anhydrous magnesium sulfate The solvent was evaporated

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 15.0 g of 2-ethoxyphenol, 18.0 ml of iodoethane and 30.0 g of potassium carbonate were suspended in 150 ml dimethylformamide, and the mixture was stirred at 80° C. for 30 hours. Ethyl acetate was added thereto, and the mixture was washed with water for five times and with brine, and then dried over anhydrous magnesium sulfate. The solvent was evaporated to give the title compound quantitatively as a red-brown oil. the mixture was washed with water for five times and with brine dried over anhydrous magnesium sulfate The solvent was evaporated

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 15.0 g of 2-ethoxyphenol, 18.0 ml of iodoethane and 30.0 g of potassium carbonate were suspended in 150 ml dimethylformamide, and the mixture was stirred at 80° C. for 30 hours. Ethyl acetate was added thereto, and the mixture was washed with water for five times and with brine, and then dried over anhydrous magnesium sulfate. The solvent was evaporated to give the title compound quantitatively as a red-brown oil. the mixture was washed with water for five times and with brine dried over anhydrous magnesium sulfate The solvent was evaporated

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 15.0 g of 2-ethoxyphenol, 18.0 ml of iodoethane and 30.0 g of potassium carbonate were suspended in 150 ml dimethylformamide, and the mixture was stirred at 80° C. for 30 hours. Ethyl acetate was added thereto, and the mixture was washed with water for five times and with brine, and then dried over anhydrous magnesium sulfate. The solvent was evaporated to give the title compound quantitatively as a red-brown oil. the mixture was washed with water for five times and with brine dried over anhydrous magnesium sulfate The solvent was evaporated

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 15.0 g of 2-ethoxyphenol, 18.0 ml of iodoethane and 30.0 g of potassium carbonate were suspended in 150 ml dimethylformamide, and the mixture was stirred at 80° C. for 30 hours. Ethyl acetate was added thereto, and the mixture was washed with water for five times and with brine, and then dried over anhydrous magnesium sulfate. The solvent was evaporated to give the title compound quantitatively as a red-brown oil. the mixture was washed with water for five times and with brine dried over anhydrous magnesium sulfate The solvent was evaporated

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 15.0 g of 2-ethoxyphenol, 18.0 ml of iodoethane and 30.0 g of potassium carbonate were suspended in 150 ml dimethylformamide, and the mixture was stirred at 80° C. for 30 hours. Ethyl acetate was added thereto, and the mixture was washed with water for five times and with brine, and then dried over anhydrous magnesium sulfate. The solvent was evaporated to give the title compound quantitatively as a red-brown oil. the mixture was washed with water for five times and with brine dried over anhydrous magnesium sulfate The solvent was evaporated

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

Procedure: 1.1 A solution of 70 ml 3-chlorocarbonyl-propionic acid methyl ester in 100 ml dichloromethane is added to a suspension of 80.0 g of AlCl3 in 300 ml dichloromethane at 20-25°. At 0° a solution of 85.0 g 1,2-diethoxybenzene in 100 ml dichloromethane is added. The solution is tirred for 14 hours at room temperature. Work-up is as usual, yielding 122.2 g of 4-(3,4-diethoxy-phenyl)-4-oxo-butyric acid methyl ester (“AA”), m.p. 84-85°.

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

Procedure: Prepared from 1,2-diethoxybenzene and cis-hexahydrophthalic anhydride as described for compound A. M.p.: low melting solid.

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

Procedure: Prepared from 1,2-Diethoxybenzene and cis-1,2,3,6-tetrahydrophthalic anhydride as described for compound A3. M.p. 125-127° C.

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 15.0 g of 2-ethoxyphenol, 18.0 ml of iodoethane and 30.0 g of potassium carbonate were suspended in 150 ml dimethylformamide, and the mixture was stirred at 80° C. for 30 hours. Ethyl acetate was added thereto, and the mixture was washed with water for five times and with brine, and then dried over anhydrous magnesium sulfate. The solvent was evaporated to give the title compound quantitatively as a red-brown oil. the mixture was washed with water for five times and with brine dried over anhydrous magnesium sulfate The solvent was evaporated

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 15.0 g of 2-ethoxyphenol, 18.0 ml of iodoethane and 30.0 g of potassium carbonate were suspended in 150 ml dimethylformamide, and the mixture was stirred at 80° C. for 30 hours. Ethyl acetate was added thereto, and the mixture was washed with water for five times and with brine, and then dried over anhydrous magnesium sulfate. The solvent was evaporated to give the title compound quantitatively as a red-brown oil. the mixture was washed with water for five times and with brine dried over anhydrous magnesium sulfate The solvent was evaporated