Sodium cyanoborohydride → 3,3-diphenyl-1-{2-[7-(trifluoromethyl)-3,4-dihydroisoquinolin-2(1H)-yl]ethyl}pyrrolidin-2-one

Participants

Reaction Steps

A solution of 7-(trifluoromethyl)-1,2,3,4-tetrahydroisoquinoline hydrochloride (0.153 g, 0.644 mmol), the product from Example 67B (0.120 g, 0.430 mmol) and sodium cyanoborohydride (0.040 g, 0.644 mmol) were stirred together in methanol (0.5 mL) at room temperature. After stirring overnight, the reaction was concentrated, dissolved in minimal dichloromethane and was loaded directly onto a SF15-12 column (Analogix®, Burlington, Wis.), and the title compound was eluted using a gradient of 5% to 100% ethyl acetate/hexanes over 20 minutes (flow=30 mL/minute). 1H NMR (300 MHz, CDCl3) δ ppm 7.36-7.42 (m, 1H), 7.29-7.34 (m, 4H), 7.18-7.26 (m, 2H), 7.12-7.18 (m, 6H), 3.66 (s, 2H), 3.63 (t, J=6.2 Hz, 2H), 3.44 (t, J=6.4 Hz, 2H), 2.69-2.84 (m, 8H); MS (ESI+) m/z 465 (M+H)+.

Provenance & Evidence