3-(4-methylphenyl)propanoyl chloride

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

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

Procedure: A solution of 15 g. of 3-(4-methylphenyl)propionyl chloride in 100 ml. of dichloromethane is created with stirring with a solution of 15 g. of benzocaine and 9.13 g. of triethylamine in 100 ml. of dichloromethane. The mixture is stirred overnight, then washed with 100 ml. each of 10% hydrochloric acid, water, and brine, then dried with magnesium sulfate, and evaporated to yield a solid. This solid is crystallized from 200 ml. of acetonitrile and dried in vacuo, giving 22.08 g. of the desired product, m.p. 154°-155° C. The mixture is stirred overnight washed with 100 ml each of 10% hydrochloric acid, water, and brine, then dried with magnesium sulfate evaporated to yield a solid This solid is crystallized from 200 ml of acetonitrile and dried in vacuo giving 22.08 g

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

Procedure: A solution of 15 g. of 3-(4-methylphenyl)propionyl chloride in 100 ml. of dichloromethane is created with stirring with a solution of 15 g. of benzocaine and 9.13 g. of triethylamine in 100 ml. of dichloromethane. The mixture is stirred overnight, then washed with 100 ml. each of 10% hydrochloric acid, water, and brine, then dried with magnesium sulfate, and evaporated to yield a solid. This solid is crystallized from 200 ml. of acetonitrile and dried in vacuo, giving 22.08 g. of the desired product, m.p. 154°-155° C. The mixture is stirred overnight washed with 100 ml each of 10% hydrochloric acid, water, and brine, then dried with magnesium sulfate evaporated to yield a solid This solid is crystallized from 200 ml of acetonitrile and dried in vacuo giving 22.08 g

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

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

Procedure: A solution of triphenylphosphine (0.117 moles, 30.8 g) in acetone (200 ml) is added under a nitrogen stream at r.t. with Cu (I) bis-(triphenyl-phosphine)-tetrahydroborate (0.067 moles, 40.69 g), then 3-(4-methylphenyl)propanoyl chloride (0.055 moles, 10 g) dissolved in acetone (85 ml) is dropped in 45'. The mixture is stirred at r.t. under nitrogen for 1 h. The precipitated solid is filtered, washing with acetone and the filtrate is evaporated under vacuum. The residue is dissolved in chloroform (340 ml), added with cuprous chloride (0.135 moles, 13.38 g) and stirred under nitrogen stream for 1 h at r.t. The mixture is filtered through celite, the filtrate is evaporated to dryness and the resulting residue is taken up into ethyl ether and petroleum ether, filtered and evaporated under vacuum to obtain an oil. Yield: 6.7 g (83%) is dropped in 45' The precipitated solid is filtered washing with acetone the filtrate is evaporated under vacuum The residue is dissolved in chloroform (340 ml) stirred under nitrogen stream for 1 h at r.t The mixture is filtered through celite the filtrate is evaporated to dryness filtered evaporated under vacuum to obtain an oil

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

Procedure: 3-(4-Methylphenyl)propanoic acid (0.055 moles, 9 g) is dissolved in thionyl chloride (1.008 moles, 120 g). The mixture is stirred for 30' at r.t., then refluxed for 1 h 30', evaporated under vacuum to an oil and taken up with toluene and hexane, each time evaporating to dryness. Yield: 12.4 g refluxed for 1 h 30', evaporated under vacuum to an oil each time evaporating to dryness

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of oxalyl chloride (5 ml) in dichloromethane (5 ml) was added dropwise to a solution of 3-(4-methylphenyl)propionic acid (1.5 g) in dichloromethane (20 ml). The mixture was stirred at 20° C. for 16 hours and then evaporated to give 3-(4-methylphenyl)propionyl chloride as an oil. evaporated

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

Procedure: A solution of 15 g. of 3-(4-methylphenyl)propionyl chloride in 100 ml. of dichloromethane is created with stirring with a solution of 15 g. of benzocaine and 9.13 g. of triethylamine in 100 ml. of dichloromethane. The mixture is stirred overnight, then washed with 100 ml. each of 10% hydrochloric acid, water, and brine, then dried with magnesium sulfate, and evaporated to yield a solid. This solid is crystallized from 200 ml. of acetonitrile and dried in vacuo, giving 22.08 g. of the desired product, m.p. 154°-155° C. The mixture is stirred overnight washed with 100 ml each of 10% hydrochloric acid, water, and brine, then dried with magnesium sulfate evaporated to yield a solid This solid is crystallized from 200 ml of acetonitrile and dried in vacuo giving 22.08 g