prop-2-enyl 4-chlorobutanoate

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: Sodium (9.06 g; 0.39 mole) was decomposed in allyl alcohol (380 ml). The obtained solution was treated by dropwise adding of first ethyl mercaptoacetate (42.7 ml; 0.39 mole) at the temperature of 0° C. and then of allyl 4-chlorobutyrate (58.3 g; 0.36 mole) prepared according to the process disclosed in Example 2a. The obtained mixture was stirred for three hours at room temperature and then for 1 hour at reflux temperature. The mixture was concentrated by evaporation and poured into a mixture of diethylether (200 ml) and of an ice/water mixture (100 g). The obtained solution was acidified with 1M hydrochloric acid solution to achieve a pH value of the medium between 3 and 6. The ether phase was separated and the obtained aqueous phase was extracted with diethyl ether (200 ml). The combined ether fractions were washed with water (200 ml) and 4% aqueous sodium hydrogencarbonate solution (200 ml) and dried with magnesium sulfate. After the removal of the drying agent and evaporation of ether, the title compound (78.1 g; 84%) was obtained, which was used in the crude form in the next reaction. The obtained solution was treated for 1 hour at reflux temperature The mixture was concentrated by evaporation poured into a mixture of diethylether (200 ml) and of an ice/water mixture (100 g) The ether phase was separated the obtained aqueous phase was extracted with diethyl ether (200 ml) The combined ether fractions were washed with water (200 ml) and 4% aqueous sodium hydrogencarbonate solution (200 ml) dried with magnesium sulfate After the removal of the drying agent and evaporation of ether

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

Procedure: Sodium (9.06 g; 0.39 mole) was decomposed in allyl alcohol (380 ml). The obtained solution was treated by dropwise adding of first ethyl mercaptoacetate (42.7 ml; 0.39 mole) at the temperature of 0° C. and then of allyl 4-chlorobutyrate (58.3 g; 0.36 mole) prepared according to the process disclosed in Example 2a. The obtained mixture was stirred for three hours at room temperature and then for 1 hour at reflux temperature. The mixture was concentrated by evaporation and poured into a mixture of diethylether (200 ml) and of an ice/water mixture (100 g). The obtained solution was acidified with 1M hydrochloric acid solution to achieve a pH value of the medium between 3 and 6. The ether phase was separated and the obtained aqueous phase was extracted with diethyl ether (200 ml). The combined ether fractions were washed with water (200 ml) and 4% aqueous sodium hydrogencarbonate solution (200 ml) and dried with magnesium sulfate. After the removal of the drying agent and evaporation of ether, the title compound (78.1 g; 84%) was obtained, which was used in the crude form in the next reaction. The obtained solution was treated for 1 hour at reflux temperature The mixture was concentrated by evaporation poured into a mixture of diethylether (200 ml) and of an ice/water mixture (100 g) The ether phase was separated the obtained aqueous phase was extracted with diethyl ether (200 ml) The combined ether fractions were washed with water (200 ml) and 4% aqueous sodium hydrogencarbonate solution (200 ml) dried with magnesium sulfate After the removal of the drying agent and evaporation of ether

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

Procedure: Sodium (9.06 g; 0.39 mole) was decomposed in allyl alcohol (380 ml). The obtained solution was treated by dropwise adding of first ethyl mercaptoacetate (42.7 ml; 0.39 mole) at the temperature of 0° C. and then of allyl 4-chlorobutyrate (58.3 g; 0.36 mole) prepared according to the process disclosed in Example 2a. The obtained mixture was stirred for three hours at room temperature and then for 1 hour at reflux temperature. The mixture was concentrated by evaporation and poured into a mixture of diethylether (200 ml) and of an ice/water mixture (100 g). The obtained solution was acidified with 1M hydrochloric acid solution to achieve a pH value of the medium between 3 and 6. The ether phase was separated and the obtained aqueous phase was extracted with diethyl ether (200 ml). The combined ether fractions were washed with water (200 ml) and 4% aqueous sodium hydrogencarbonate solution (200 ml) and dried with magnesium sulfate. After the removal of the drying agent and evaporation of ether, the title compound (78.1 g; 84%) was obtained, which was used in the crude form in the next reaction. The obtained solution was treated for 1 hour at reflux temperature The mixture was concentrated by evaporation poured into a mixture of diethylether (200 ml) and of an ice/water mixture (100 g) The ether phase was separated the obtained aqueous phase was extracted with diethyl ether (200 ml) The combined ether fractions were washed with water (200 ml) and 4% aqueous sodium hydrogencarbonate solution (200 ml) dried with magnesium sulfate After the removal of the drying agent and evaporation of ether

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

Procedure: To a mixture of 4-chlorobutyric acid (48 ml; 0.48 mole), allyl alcohol (200 ml) and hexane (1.2 l) p-toluenesulfonic acid (16.0 g; 0.08 mole) was added. The obtained mixture was heated for 5 hours at reflux temperature in such a way that water was simultaneously removed with Dean-Stark apparatus (Vogel's Textbook of Practical Organic Chemistry, Fourth Ed., Longman, London, 1978, p. 411). The mixture was then cooled to room temperature and shaken with 7% aqueous sodium hydrogencarbonate solution (2×500 ml). The obtained solution was dried with magnesium sulfate and after the filtration of the drying agent hexane was evaporated. The crude residue was distilled under reduced pressure 10 mbar at the temperature of 95° C. and the title compound (61.2 g; 79%) was obtained in the form of a colourless oil. was added The obtained mixture was heated for 5 hours was simultaneously removed with Dean-Stark apparatus (Vogel's Textbook of Practical Organic Chemistry, Fourth Ed., Longman, London, 1978, p. 411) The obtained solution was dried with magnesium sulfate after the filtration of the drying agent hexane was evaporated The crude residue was distilled under reduced pressure 10 mbar at the temperature of 95° C.

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

Procedure: To a mixture of 4-chlorobutyric acid (48 ml; 0.48 mole), allyl alcohol (200 ml) and hexane (1.2 l) p-toluenesulfonic acid (16.0 g; 0.08 mole) was added. The obtained mixture was heated for 5 hours at reflux temperature in such a way that water was simultaneously removed with Dean-Stark apparatus (Vogel's Textbook of Practical Organic Chemistry, Fourth Ed., Longman, London, 1978, p. 411). The mixture was then cooled to room temperature and shaken with 7% aqueous sodium hydrogencarbonate solution (2×500 ml). The obtained solution was dried with magnesium sulfate and after the filtration of the drying agent hexane was evaporated. The crude residue was distilled under reduced pressure 10 mbar at the temperature of 95° C. and the title compound (61.2 g; 79%) was obtained in the form of a colourless oil. was added The obtained mixture was heated for 5 hours was simultaneously removed with Dean-Stark apparatus (Vogel's Textbook of Practical Organic Chemistry, Fourth Ed., Longman, London, 1978, p. 411) The obtained solution was dried with magnesium sulfate after the filtration of the drying agent hexane was evaporated The crude residue was distilled under reduced pressure 10 mbar at the temperature of 95° C.

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

Procedure: To a mixture of 4-chlorobutyric acid (48 ml; 0.48 mole), allyl alcohol (200 ml) and hexane (1.2 l) p-toluenesulfonic acid (16.0 g; 0.08 mole) was added. The obtained mixture was heated for 5 hours at reflux temperature in such a way that water was simultaneously removed with Dean-Stark apparatus (Vogel's Textbook of Practical Organic Chemistry, Fourth Ed., Longman, London, 1978, p. 411). The mixture was then cooled to room temperature and shaken with 7% aqueous sodium hydrogencarbonate solution (2×500 ml). The obtained solution was dried with magnesium sulfate and after the filtration of the drying agent hexane was evaporated. The crude residue was distilled under reduced pressure 10 mbar at the temperature of 95° C. and the title compound (61.2 g; 79%) was obtained in the form of a colourless oil. was added The obtained mixture was heated for 5 hours was simultaneously removed with Dean-Stark apparatus (Vogel's Textbook of Practical Organic Chemistry, Fourth Ed., Longman, London, 1978, p. 411) The obtained solution was dried with magnesium sulfate after the filtration of the drying agent hexane was evaporated The crude residue was distilled under reduced pressure 10 mbar at the temperature of 95° C.