4-Methoxybenzylamine → (3R,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((S)-1-((4-methoxybenzyl)amino)butan-2-yl)-3-methylpiperidin-2-one

Participants

Reaction Conditions

Reaction Steps

To a solution of (S)-2-((3R,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxopiperidin-1-yl)butanal (300 mg, 0.675 mmol; Example 91, Step C) and (4-methoxyphenyl)methanamine (131 μL, 1.01 mmol) in DCE (4.5 mL) was added sodium triacetoxyborohydride (429 mg, 2.03 mmol) at 0° C. in several portions. After being stirred at 25° C. for 18 h, the reaction was quenched by adding ice-cold saturated aqueous NaHCO3 and extracted (2×DCM). The combined organic layers were washed (1×sat. aq. NaCl solution) and concentrated under reduced pressure to provide the title compound as a yellow film. The product was used in the next step without further purification.

Provenance & Evidence