methyl 3,3,3-trifluoro-2-(trifluoromethyl)propanoate

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

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

Procedure: A mixture of 7.08 g (38.07 mmol) 2,4-dinitrofluorobenzene, 2.43 g (41.88 mmol) KF, and 0.58 g (2.21 mmol) 18-crown-6-ether in 37 ml sulfolane was added 4.00 g (19.04 mmol) methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate dropwise over about 7 h via syringe pump. After the addition was complete, another 2.43 g KF, 0.58 g 18-Crown-6-ether were added and then 4.00 g Methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate were added dropwise over 12 h. The next day, repeated additions using same amounts and setting syringe pump addition over 14 h. The following day, the additions were again repeated, this time using half the amounts as above additions and setting syringe pump addition at 12 h. After addition was completed, the reaction mix was cooled to RT and diluted into Et2O and 0.5N aqueous HCl. The layers were separated, and the organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under vacuum. The crude was eluted on a silica gel column with EtOAc/hexanes gradient, to yield the titled compound, as a yellow solid. After the addition pump addition over 14 h pump addition at 12 h After addition the reaction mix The layers were separated the organic layer was washed with brine dried over Na2SO4 filtered concentrated under vacuum The crude was eluted on a silica gel column with EtOAc/hexanes gradient

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

Procedure: A mixture of 7.08 g (38.07 mmol) 2,4-dinitrofluorobenzene, 2.43 g (41.88 mmol) KF, and 0.58 g (2.21 mmol) 18-crown-6-ether in 37 ml sulfolane was added 4.00 g (19.04 mmol) methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate dropwise over about 7 h via syringe pump. After the addition was complete, another 2.43 g KF, 0.58 g 18-Crown-6-ether were added and then 4.00 g Methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate were added dropwise over 12 h. The next day, repeated additions using same amounts and setting syringe pump addition over 14 h. The following day, the additions were again repeated, this time using half the amounts as above additions and setting syringe pump addition at 12 h. After addition was completed, the reaction mix was cooled to RT and diluted into Et2O and 0.5N aqueous HCl. The layers were separated, and the organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under vacuum. The crude was eluted on a silica gel column with EtOAc/hexanes gradient, to yield the titled compound, as a yellow solid. After the addition pump addition over 14 h pump addition at 12 h After addition the reaction mix The layers were separated the organic layer was washed with brine dried over Na2SO4 filtered concentrated under vacuum The crude was eluted on a silica gel column with EtOAc/hexanes gradient

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

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

Procedure: A mixture of 7.08 g (38.07 mmol) 2,4-dinitrofluorobenzene, 2.43 g (41.88 mmol) KF, and 0.58 g (2.21 mmol) 18-crown-6-ether in 37 ml sulfolane was added 4.00 g (19.04 mmol) methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate dropwise over about 7 h via syringe pump. After the addition was complete, another 2.43 g KF, 0.58 g 18-Crown-6-ether were added and then 4.00 g Methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate were added dropwise over 12 h. The next day, repeated additions using same amounts and setting syringe pump addition over 14 h. The following day, the additions were again repeated, this time using half the amounts as above additions and setting syringe pump addition at 12 h. After addition was completed, the reaction mix was cooled to RT and diluted into Et2O and 0.5N aqueous HCl. The layers were separated, and the organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under vacuum. The crude was eluted on a silica gel column with EtOAc/hexanes gradient, to yield the titled compound, as a yellow solid. [See Vlasov et al.; J.Org. Chemistry USSR (Engl. Trans.); 15; 1979; 1953-1964).] After the addition pump addition over 14 h pump addition at 12 h After addition the reaction mix The layers were separated the organic layer was washed with brine dried over Na2SO4 filtered concentrated under vacuum The crude was eluted on a silica gel column with EtOAc/hexanes gradient

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

Procedure: A mixture of 7.08 g (38.07 mmol) 2,4-dinitrofluorobenzene, 2.43 g (41.88 mmol) KF, and 0.58 g (2.21 mmol) 18-crown-6-ether in 37 ml sulfolane was added 4.00 g (19.04 mmol) methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate dropwise over about 7 h via syringe pump. After the addition was complete, another 2.43 g KF, 0.58 g 18-Crown-6-ether were added and then 4.00 g Methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate were added dropwise over 12 h. The next day, repeated additions using same amounts and setting syringe pump addition over 14 h. The following day, the additions were again repeated, this time using half the amounts as above additions and setting syringe pump addition at 12 h. After addition was completed, the reaction mix was cooled to RT and diluted into Et2O and 0.5N aqueous HCl. The layers were separated, and the organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under vacuum. The crude was eluted on a silica gel column with EtOAc/hexanes gradient, to yield the titled compound, as a yellow solid. After the addition pump addition over 14 h pump addition at 12 h After addition the reaction mix The layers were separated the organic layer was washed with brine dried over Na2SO4 filtered concentrated under vacuum The crude was eluted on a silica gel column with EtOAc/hexanes gradient

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

Procedure: A mixture of 7.08 g (38.07 mmol) 2,4-dinitrofluorobenzene, 2.43 g (41.88 mmol) KF, and 0.58 g (2.21 mmol) 18-crown-6-ether in 37 mL sulfolane was added 4.00 g (19.04 mmol) methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate dropwise over about 7 h via syringe pump. After the addition was complete, another 2.43 g KF, 0.58 g 18-Crown-6-ether were added and then 4.00 g Methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate were added dropwise over 12 h. The next day, repeated additions using same amounts and setting syringe pump addition over 14 h. The following day, the additions were again repeated, this time using half the amounts as above additions and setting syringe pump addition at 12 h. After addition was completed, the reaction mix was cooled to RT and diluted into Et2O and 0.5 N aqueous HCl. The layers were separated, and the organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under vacuum. The crude was eluted on a silica gel column with EtOAc/hexanes gradient, to yield the titled compound, as a yellow solid. [See Vlasov et al., J. Org. Chem. USSR (Engl. Trans.), 15:1953-1964 (1979)] After the addition pump addition over 14 h pump addition at 12 h After addition the reaction mix The layers were separated the organic layer was washed with brine dried over Na2SO4 filtered concentrated under vacuum The crude was eluted on a silica gel column with EtOAc/hexanes gradient

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

Procedure: A mixture of 7.08 g (38.07 mmol) 2,4-dinitrofluorobenzene, 2.43 g (41.88 mmol) KF, and 0.58 g (2.21 mmol) 18-crown-6-ether in 37 mL sulfolane was added 4.00 g (19.04 mmol) methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate dropwise over about 7 h via syringe pump. After the addition was complete, another 2.43 g KF, 0.58 g 18-Crown-6-ether were added and then 4.00 g Methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate were added dropwise over 12 h. The next day, repeated additions using same amounts and setting syringe pump addition over 14 h. The following day, the additions were again repeated, this time using half the amounts as above additions and setting syringe pump addition at 12 h. After addition was completed, the reaction mix was cooled to RT and diluted into Et2O and 0.5 N aqueous HCl. The layers were separated, and the organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under vacuum. The crude was eluted on a silica gel column with EtOAc/hexanes gradient, to yield the titled compound, as a yellow solid. [See Vlasov et al., J. Org. Chem. USSR (Engl. Trans.), 15:1953-1964 (1979)] After the addition pump addition over 14 h pump addition at 12 h After addition the reaction mix The layers were separated the organic layer was washed with brine dried over Na2SO4 filtered concentrated under vacuum The crude was eluted on a silica gel column with EtOAc/hexanes gradient

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

Procedure: A solution of 150 g (1.5 mol) of potassium acetate in 500 ml of water was added dropwise to a solution of 105 g (0.5 mol) of methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate as above produced in 250 ml of water and the mixture was refluxed for 5 hours. After separation of the oily layer, extraction was made from the water layer that was left with use of methylene chloride and the solution of extracts and separated oily layer were joined and dried. After methylene chloride was removed by evaporation under atmospheric pressure, purification was made by distillation to give methyl 3,3,3-trifluoropropionate (TFPE) (54.07 g, 76%). Its analysis gave the following data: the mixture was refluxed for 5 hours After separation of the oily layer, extraction was left with use of methylene chloride the solution of extracts and separated oily layer dried After methylene chloride was removed by evaporation under atmospheric pressure, purification was made by distillation

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

Procedure: A mixture of 7.08 g (38.07 mmol) 2,4-dinitrofluorobenzene, 2.43 g (41.88 mmol) KF, and 0.58 g (2.21 mmol) 18-crown-6-ether in 37 ml sulfolane was added 4.00 g (19.04 mmol) methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate dropwise over about 7 h via syringe pump. After the addition was complete, another 2.43 g KF, 0.58 g 18-Crown-6-ether were added and then 4.00 g Methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate were added dropwise over 12 h. The next day, repeated additions using same amounts and setting syringe pump addition over 14 h. The following day, the additions were again repeated, this time using half the amounts as above additions and setting syringe pump addition at 12 h. After addition was completed, the reaction mix was cooled to RT and diluted into Et2O and 0.5N aqueous HCl. The layers were separated, and the organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under vacuum. The crude was eluted on a silica gel column with EtOAc/hexanes gradient, to yield the titled compound, as a yellow solid. After the addition pump addition over 14 h pump addition at 12 h After addition the reaction mix The layers were separated the organic layer was washed with brine dried over Na2SO4 filtered concentrated under vacuum The crude was eluted on a silica gel column with EtOAc/hexanes gradient

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

Procedure: To a solution of 105 g (0.5 mol) of methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate in 250 ml of water, a solution of 150 g (1.5 mol) of potassium acetate in 500 ml of water was added dropwise and the mixture was refluxed for 5 hours. After separation of the oily layer, extraction was made from the water layer that was left using methylene chloride. The oily layer and extracted fraction were joined and dried. After evaporation of methylene chloride under atmospheric pressure, purification by distillation was performed to give methyl 3,3,3-trifluoropropionate (TFPE) (54.07 g, 76%). Its analysis gave the following data: the mixture was refluxed for 5 hours After separation of the oily layer, extraction was left The oily layer and extracted fraction dried After evaporation of methylene chloride under atmospheric pressure, purification by distillation

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

Procedure: A mixture of 7.08 g (38.07 mmol) 2,4-dinitrofluorobenzene, 2.43 g (41.88 mmol) KF, and 0.58 g (2.21 mmol) 18-crown-6-ether in 37 ml sulfolane was added 4.00 g (19.04 mmol) methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate dropwise over about 7 h via syringe pump. After the addition was complete, another 2.43 g KF, 0.58 g 18-Crown-6-ether were added and then 4.00 g Methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate were added dropwise over 12 h. The next day, repeated additions using same amounts and setting syringe pump addition over 14 h. The following day, the additions were again repeated, this time using half the amounts as above additions and setting syringe pump addition at 12 h. After addition was completed, the reaction mix was cooled to RT and diluted into Et2O and 0.5N aqueous HCl. The layers were separated, and the organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under vacuum. The crude was eluted on a silica gel column with EtOAc/hexanes gradient, to yield the titled compound, as a yellow solid. After the addition pump addition over 14 h pump addition at 12 h After addition the reaction mix The layers were separated the organic layer was washed with brine dried over Na2SO4 filtered concentrated under vacuum The crude was eluted on a silica gel column with EtOAc/hexanes gradient