Water → N-{[1-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2-naphthyl]methyl}-aniline

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Reaction Conditions

Reaction Steps

A mixture of 12.0 g (129 mmol) of aniline, 30.0 g (86.5 mmol) of 2-[2-(bromomethyl)-1-naphthyl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and 13.1 g (94.9 mmol) of K2CO3 in 500 cm3 of DMF was stirred for 12 h at 80° C. The resulting mixture was poured into 1000 cm3 of water. The product was extracted with 3×200 ml of ethyl acetate. The combined extract was dried over MgSO4 and then evaporated to dryness. An excess of aniline was distilled off using Kugelrohr apparatus. Yield 25.3 g (82%). Anal. calc. for C23H26BNO2: C, 76.89; H, 7.29; N, 3.90. Found: C, 77.02; H, 7.45; N, 3.70. 1H NMR (CDCl3): δ 8.19 (m, 1H, 8-H in naphthalene), 7.83 (d, J=8.8 Hz, 1H, 4-H in naphthalene), 7.80 (m, 1H, 5-H in naphthalene), 7.49 (d, J=8.8 Hz, 1H, 3-H in naphthalene), 7.40-7.51 (m, 2H, 6, 7-H in naphthalene), 7.19 (m, 2H, 2, 6-H in Ph), 6.75 (m, 1H, 4-H in Ph), 6.69 (m, 2H, 3, 5-H in Ph), 4.51 (s, 2H, CH2N), 4.07 (br.s, 1H, NH), 1.38 (s, 12H, Me in tetramethyldioxaborolane).

Provenance & Evidence