Triphenylphosphine → (S)-1,4-Dibenzyl-2-(2-pridin-4-yl-ethyl)-piperazine

Participants

Reaction Steps

Prepared by the method in Example 128, using 9-borabicyclo[3.3.1]nonane (71.4 mL, 35.7 mmol, 0.5 M in THF), (S)-1,4-dibenzyl-2-vinyl-piperazine (2.61 g, 8.92 mmol), triphenylphosphine (749 mg, 2.86 mmol), tetrakis(triphenylphosphine)palladium(0) (413 mg, 0.36 mmol), 4-bromopyridine hydrochloride (2.60 g, 13.4 mmol) and 3M NaOH (10.4 mL, 31.2 mmol) to give the title compound (1.87 g, 56%): mp 96–98° C.; mass spectrum (ion spray): m/z=372 (M+1). Analysis calculated for C25H29N3: C, 80.82; H, 7.87; N, 11.31. Found: C, 80.80; H, 7.99; N, 11.18.

Provenance & Evidence