N-methyl-2-phenylpropan-2-amine

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

Procedure: To a solution of 2-phenylpropan-2-amine (1 eq.) in benzene (0.25 M) was added formaldehyde (37% w/w aqueous solution, 2 eq.). The vessel attached a Dean-Stark apparatus and heated at 80° C. for 36 h. The reaction mixture was cooled to RT, dried with Na2SO4 and filtered. Concentration of the filtrate in vacuo afforded the crude imine. This was then taken up in methanol (1.4 M) and added sodium borohydride (10 eq.). The resulting mixture was stirred at RT for 2 h and then quenched with 1 N aq. HCl. The volatiles were removed in vacuo and the pH of the resulting residue was carefully brought up to ˜12 with 1 N aq. NaOH. The mixture was then extracted with EtOAc. The combined organic extracts were washed with brine, dried over MgSO4, filtered and the filtrate concentrated in vacuo. Purification of the crude product thus obtained by way of column chromatography (SiO2, 2:1 (v/v) Hex:EtOAc→EtOAc) afforded the title compound as a colorless oil. The reaction mixture was cooled to RT dried with Na2SO4 filtered Concentration of the filtrate in vacuo afforded the crude imine quenched with 1 N aq. HCl The volatiles were removed in vacuo The mixture was then extracted with EtOAc The combined organic extracts were washed with brine dried over MgSO4 filtered the filtrate concentrated in vacuo Purification of the crude product thus obtained by way of column chromatography (SiO2, 2:1 (v/v) Hex:EtOAc→EtOAc)

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

Procedure: To a solution of 2-phenylpropan-2-amine (1 eq.) in benzene (0.25 M) was added formaldehyde (37% w/w aqueous solution, 2 eq.). The vessel attached a Dean-Stark apparatus and heated at 80° C. for 36 h. The reaction mixture was cooled to RT, dried with Na2SO4 and filtered. Concentration of the filtrate in vacuo afforded the crude imine. This was then taken up in methanol (1.4 M) and added sodium borohydride (10 eq.). The resulting mixture was stirred at RT for 2 h and then quenched with 1 N aq. HCl. The volatiles were removed in vacuo and the pH of the resulting residue was carefully brought up to ˜12 with 1 N aq. NaOH. The mixture was then extracted with EtOAc. The combined organic extracts were washed with brine, dried over MgSO4, filtered and the filtrate concentrated in vacuo. Purification of the crude product thus obtained by way of column chromatography (SiO2, 2:1 (v/v) Hex:EtOAc→EtOAc) afforded the title compound as a colorless oil. The reaction mixture was cooled to RT dried with Na2SO4 filtered Concentration of the filtrate in vacuo afforded the crude imine quenched with 1 N aq. HCl The volatiles were removed in vacuo The mixture was then extracted with EtOAc The combined organic extracts were washed with brine dried over MgSO4 filtered the filtrate concentrated in vacuo Purification of the crude product thus obtained by way of column chromatography (SiO2, 2:1 (v/v) Hex:EtOAc→EtOAc)

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

Procedure: To a solution of 2-phenylpropan-2-amine (1 eq.) in benzene (0.25 M) was added formaldehyde (37% w/w aqueous solution, 2 eq.). The vessel attached a Dean-Stark apparatus and heated at 80° C. for 36 h. The reaction mixture was cooled to RT, dried with Na2SO4 and filtered. Concentration of the filtrate in vacuo afforded the crude imine. This was then taken up in methanol (1.4 M) and added sodium borohydride (10 eq.). The resulting mixture was stirred at RT for 2 h and then quenched with 1 N aq. HCl. The volatiles were removed in vacuo and the pH of the resulting residue was carefully brought up to ˜12 with 1 N aq. NaOH. The mixture was then extracted with EtOAc. The combined organic extracts were washed with brine, dried over MgSO4, filtered and the filtrate concentrated in vacuo. Purification of the crude product thus obtained by way of column chromatography (SiO2, 2:1 (v/v) Hex:EtOAc→EtOAc) afforded the title compound as a colorless oil. The reaction mixture was cooled to RT dried with Na2SO4 filtered Concentration of the filtrate in vacuo afforded the crude imine quenched with 1 N aq. HCl The volatiles were removed in vacuo The mixture was then extracted with EtOAc The combined organic extracts were washed with brine dried over MgSO4 filtered the filtrate concentrated in vacuo Purification of the crude product thus obtained by way of column chromatography (SiO2, 2:1 (v/v) Hex:EtOAc→EtOAc)