Water → 2,6-Diisopropyl-N-{[6-(2-methyl-6-{[(2-methylphenyl)amino]methyl}phenyl)pyridin-2-yl]methyl}aniline

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Reaction Conditions

Reaction Steps

A mixture of 5.50 g (19 mmol) of Na2CO3×10H2O, 100 ml of water and 30 ml of methanol was purged with argon for 30 min. The obtained solution was added to a mixture of 2.60 g (7.7 mmol) of 2-methyl-N-[3-methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl]aniline, 2.68 g (7.7 mmol) of N-[(6-bromopyridin-2-yl)methyl]-2,6-diisopropylaniline, and 0.44 g (0.39 mmol) of Pd(PPh3)4 in 120 ml of toluene. This mixture was stirred for 12 h at 70° C., then cooled to room temperature. The organic layer was separated, the aqueous layer was extracted with 3×50 ml of ethyl acetate. The combined organic extract was washed with brine, dried over Na2SO4, and evaporated to dryness. The residue was purified by flash chromatography on silica gel 60 (40-63 um; eluent: hexane-triethylamine=20:1, vol.). Yield 2.10 g (57%) of white crystalline solid. Anal. calc. for C33H39N3: C, 82.97; H, 8.23; N, 8.80. Found: C, 83.19; H, 8.45; N, 8.62. 1H NMR (CDCl3): δ 7.71 (m, 1H), 7.37 (m, 1H), 7.28-7.32 (m, 2H), 7.22-7.26 (m, 2H), 7.00-7.13 (m, 5H), 6.61 (m, 1H), 6.47 (m, 1H), 4.25 (s, 2H), 4.10 (s, 2H), 3.98 (br.s, 1H), 3.82 (br.s, 1H), 3.31 (s, J=6.9 Hz, 2H), 2.14 (s, 3H), 2.09 (s, 3H), 1.21 (d, J=6.9 Hz, 12H).

Provenance & Evidence