Tributylvinyltin → HCID 59860362, compound

Participants

Reaction Conditions

Reaction Steps

Dissolve (S)-(2,4-dichlorobenzyl)-[1-(5-iodopyridin-2-yl)-pyrrolidin-3-yl]-amine hydrochloride (200 mg, 0.41 mmol) in DMF (7 mL) and triethylamine (60 μL). Add tetrakis(triphenylphosphine)palladium (0) (24 mg, 0.021 mmol) and tributyl(vinyl)tin (150 μL, 0.49 mmol). Heat the mixture at 65° C. overnight. Cool to room temperature, dilute with 1 N HCl (15 mL). Wash the mixture with dichloromethane (3×). Basify the aqueous solution to about pH=9 by adding solid potassium carbonate. Extract with dichloromethane (3×), dry (magnesium sulfate), concentrate and chromatograph on silica gel, eluting with 10:90 to 1:1 ethyl acetate:hexanes, to give the title compound as a residue. Dissolve the residue in methanol, add 1 N HCl in methanol (1 mL). Concentrate and dry in a vacuum oven at 60° C. to give the title compound as its hydrochloride salt (97 mg, 56%): 1H NMR (400 MHz, MeOH-d4) 8.30 (dd, 1H, J=8.8, 2.0 Hz), 7.97 (d, 1H, J=2.4 Hz), 7.71 (d, 1H, J=8.0 Hz), 7.68 (d, 1H, J=1.6 Hz), 7.50 (dd, 1H, J=8.0, 2.2 Hz), 7.16 (d, 1H, J=9.2 Hz), 6.70 (dd, 1H, J=17.6, 11.2 Hz), 5.87 (d, 1H, J=17.6 Hz), 5.40 (d, 1H, J=11.2 Hz), 4.55-4.47 (m, 2H), 4.34-4.28 (m, 1H), 4.18-4.13 (m, 1H), 3.97-3.91 (m, 2H), 3.80-3.74 (m, 1H), 2.77-2.68 (m, 1H), 2.55-2.46 (m, 1H), MS (ES): m/z 348 [M+H].

Provenance & Evidence