tert-Butylsulfinamide, (R)-(+)- → (R)-2-methyl-N-((4-(trifluoromethyl)pyridin-3-yl)methylene)propane-2-sulfinamide

Participants

Reaction Steps

To a the solution of 4-(trifluoromethyl)nicotinaldehyde from above was added DCM (10 mL), (R)-2-methylpropane-2-sulfinamide (1.553 g, 12.81 mmol; See Table 1, footnote 1) (AK Scientific) and copper sulfate (4.09 g, 25.6 mmol) (Aldrich, anhydrous). The suspension was stirred at rt under N2 for 68 h. The suspension was then filtered through Celite® brand filter agent, and the solid was washed with DCM (2×20 mL). The filtrates were concentrated and purified by ISCO (40 g, SiO2, 10-50% EtOAc/hexane) to give (R)-2-methyl-N-((4-(trifluoromethyl)pyridin-3-yl)methylene)propane-2-sulfinamide as a light yellow oil.

Provenance & Evidence