Tri(butyl)vinyltin → HCID 67135540, compound

Participants

Reaction Steps

A solution of 3-amino-6-bromo-3′,4′,5′,6′-tetrahydro-2′H-[2,4]bipyridinyl-1′-carboxylic acid tert-butyl ester (0.49 g, prepared from 3-amino-2-bromo-pyridine following procedures described in Example 6, Step A to Step C), tributylvinyl tin (0.36 g), tetrakis(triphenylphosphine)palladium (0.035 g) in toluene (20 ml) was heated at reflux for 3 hours. The reaction mixture was cooled to ambient temperature and the solvent removed in vacuo. The residue was purified by chromatography on silica gel (eluent: cyclohexane/ethyl acetate 1:1) to afford 3-amino-6-vinyl-3′,4′,5′,6′-tetrahydro-2′H-[2,4]bipyridinyl-1′-carboxylic acid tert-butyl ester (0.32 g) as a yellow solid. MS (ES+) 443/445 (MH+); 1H NMR (400 MHz, CDCl3) 1.40 (s, 9H), 1.70 (m, 2H), 1.90 (m, 2H), 2.75 (m, 2H), 2.80 (m, 1H), 4.15 (m, 2H), 5.4 (d, 1H), 6.2 (d, 1H), 6.7 (dd, 1H), 7.15 (d, 1H), 7.6 (d, 1H), 7.7 (s, 1H), 7.8 (m, 1H), 7.9 (s, 1H), 8.5 (d, 1H).

Provenance & Evidence