3-methylsulfanylpropanal

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 solution of 3-(methylthio)propanal (5.2 g, 0.05 mol) and ethyleneglycol (3.4 g. 0.055 mol) in 100 mL of benzene was treated with 300 mg p-toluenesulfonic acid and heated at reflux for 4 hrs. The solution was cooled and decanted. Concentration and drying in vacuo provided the title compound as a light yellow oil. 1H NMR (300 MHz, CDCl3) δ ppm: 4.93 (1H, t, J=4.76 Hz) 3.74–4.03 (4H, m) 2.46–2.68 (2H, m) 2.08 (3H, s) 1.83–2.00 (2H, m). heated at reflux for 4 hrs The solution was cooled decanted Concentration drying in vacuo

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

Procedure: Into a 100 ml three necked reaction flask equipped with stirrer, thermometer and addition funnel is charged a solution of 0.5 grams of potassium hydroxide in 10 ml methanol. Benzaldehyde (10.0 grams) is added as the mixture is cooled to 5°-10° C. Methional (10.0 grams) is then added dropwise while maintaining the reaction temperature at 5°-10° C. The mixture is then allowed to warm to room temperature and stirred for a period of 1 hour. Most of the solvent is evaporated at reduced pressure and the mixture is partitioned between water and ether. The organic layer is washed several times with water and once with saturated brine. The solvent is evaporated leaving a yellow oil which is distilled to give 6.1 grams product, boiling point 104°-111° C. (0.4 mm Hg). thermometer and addition funnel is cooled to 5°-10° C while maintaining the reaction temperature at 5°-10° C Most of the solvent is evaporated at reduced pressure the mixture is partitioned between water and ether The organic layer is washed several times with water The solvent is evaporated leaving a yellow oil which is distilled

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

Procedure: Into a 100 ml three necked reaction flask equipped with stirrer, thermometer and addition funnel is charged a solution of 0.5 grams of potassium hydroxide in 10 ml methanol. Benzaldehyde (10.0 grams) is added as the mixture is cooled to 5°-10° C. Methional (10.0 grams) is then added dropwise while maintaining the reaction temperature at 5°-10° C. The mixture is then allowed to warm to room temperature and stirred for a period of 1 hour. Most of the solvent is evaporated at reduced pressure and the mixture is partitioned between water and ether. The organic layer is washed several times with water and once with saturated brine. The solvent is evaporated leaving a yellow oil which is distilled to give 6.1 grams product, boiling point 104°-111° C. (0.4 mm Hg). thermometer and addition funnel is cooled to 5°-10° C while maintaining the reaction temperature at 5°-10° C Most of the solvent is evaporated at reduced pressure the mixture is partitioned between water and ether The organic layer is washed several times with water The solvent is evaporated leaving a yellow oil which is distilled

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Into a 1 liter reaction flask equipped with mechanical stirrer, 250 ml addition funnel, Y adapter, thermometer and Friedrich condenser is placed 208 grams of methional. The reaction mass is cooled to 0° C. and 100 ml of a 0.5 molar solution of sodium hydroxide is added dropwise with stirring. The resulting reaction mass is extracted with three 100 ml portions of methylene chloride and the extracts are combined, dried over anhydrous sodium sulfate and evaporated on a rotary evaporator. The resulting product was then subjected to vacuum distillation to give the product, boiling point 129° C. (1 mm Hg). Into a 1 liter reaction flask equipped with mechanical stirrer, 250 ml addition funnel The resulting reaction mass is extracted with three 100 ml portions of methylene chloride dried over anhydrous sodium sulfate evaporated on a rotary evaporator The resulting product was then subjected to vacuum distillation to give the product, boiling point 129° C. (1 mm Hg)

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Into a 1 liter reaction flask equipped with mechanical stirrer, 250 ml addition funnel, Y adapter, thermometer and Friedrich condenser is placed 208 grams of methional. The reaction mass is cooled to 0° C. and 100 ml of a 0.5 molar solution of sodium hydroxide is added dropwise with stirring. The resulting reaction mass is extracted with three 100 ml portions of methylene chloride and the extracts are combined, dried over anhydrous sodium sulfate and evaporated on a rotary evaporator. The resulting product was then subjected to vacuum distillation to give the product, boiling point 129° C. (1 mm Hg). Into a 1 liter reaction flask equipped with mechanical stirrer, 250 ml addition funnel The resulting reaction mass is extracted with three 100 ml portions of methylene chloride dried over anhydrous sodium sulfate evaporated on a rotary evaporator The resulting product was then subjected to vacuum distillation to give the product, boiling point 129° C. (1 mm Hg)

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

Procedure: 1040 g (10 moles) of freshly distilled methional, 650 g (10.5 moles) of ethylene glycol, 400 cc of benzene, 800 cc of dioxan and 10 g of p-toluene sulphonic acid are heated under reflux until the azeotropic entrainment of the water formed during the reaction, which takes 2 hours, is over. The acid medium is then neutralised by the addition of 10 g of dry sodium carbonate, after which the solution is concentrated to dryness in a water pump vacuum. formed during the reaction, which after which the solution is concentrated to dryness in a water pump vacuum

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

Procedure: 1040 g (10 moles) of freshly distilled methional, 650 g (10.5 moles) of ethylene glycol, 400 cc of benzene, 800 cc of dioxan and 10 g of p-toluene sulphonic acid are heated under reflux until the azeotropic entrainment of the water formed during the reaction, which takes 2 hours, is over. The acid medium is then neutralised by the addition of 10 g of dry sodium carbonate, after which the solution is concentrated to dryness in a water pump vacuum. formed during the reaction, which after which the solution is concentrated to dryness in a water pump vacuum

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

Procedure: 20.8 g (0.2 mole) of freshly distilled methional and 100 cc of methyl alcohol are heated under reflux in the presence of 0.5 g of p-toluene sulphonic acid.

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

Procedure: 20.8 g (0.2 mole) of freshly distilled methional and 100 cc of methyl alcohol are heated under reflux in the presence of 0.5 g of p-toluene sulphonic acid.

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

Procedure: Sodium triacetoxyborohydride (0.297 g) was added to a solution of 3-methylsulphanylpropionaldehyde (0.1 ml) and (R)-N-(2-chloro-4-aminophenyl)-2-hydroxy-2-methyl-3,3,3-trifluoropropanamide (Example 208) (0.282 g) in 1,2-dichloroethane (6 ml). The mixture was stirred for 16 hours. Saturated aqueous sodium hydrogen carbonate (25 ml) was added and the mixture was extracted with ethyl acetate (40 ml). The extracts were washed with brine (15 ml) then dried. Volatile material was removed by evaporation and the residue was purified by chromatography on a Varian Isolute silica column eluting with 25% ethyl acetate/hexane. The resulting solid was triturated with ether to give the title compound (0.089 g) as a solid. NMR: 1.54 (s, 3H), 1.78 (m, 2H), 2.05 (s, 3H), 2.55 (q, 2H), 3.09 (q, 2H), 5.93 (t, 1H), 6.54 (dd, 1H), 6.65 (s, 1H), 7.46 (m, 2H), 9.33 (s, 1H); MS (ESP−): 369. the mixture was extracted with ethyl acetate (40 ml) The extracts were washed with brine (15 ml) then dried Volatile material was removed by evaporation the residue was purified by chromatography on a Varian Isolute silica column eluting with 25% ethyl acetate/hexane The resulting solid was triturated with ether