Formaldehyde → 3-Hydroxy-2,2-diphenylpropanenitrile

反応式

[C:1]1([CH:7]([C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)[C:8]#[N:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH2:16]=[O:17]>N1C=CC=CC=1.O>[OH:17][CH2:16][C:7]([C:1]1[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1)([C:10]1[CH:11]=[CH:12][CH:13]=[CH:14][CH:15]=1)[C:8]#[N:9]

参加物

反応条件

温度: 23 °C

実験手順

To a suspension of 2,2-diphenylacetonitrile (2.0 g, 10.35 mmol) and paraformaldehyde (1.242 g, 41.399 mmol) in pyridine (18 mL) was added Triton B (40% solution in water, 1.022 mL, 2.587 mmol) at 0° C. The suspension instantaneously changed color. The cooling bath was removed and the reaction was stirred at 23° C. for ˜40 hours. The reaction was then acidified with acetic acid (2 mL) and poured into water (150 mL). The aqueous phase was extracted with diethyl ether (2×) and the combined organic extracts were washed with water (2×), 1N HCl (2×) and saturated sodium bicarbonate. The organic phase was dried over anhydrous magnesium sulfate, filtered and concentrated. The residue was purified on silica gel Biotage chromatography (ethyl acetate/hexane 10% to 50%) to give the title material (1.83 g, 100%) as an oil. HPLC ret. time (Condition A): 1.682 min. 1H NMR (400 MHz, CDCl3) δ ppm: 2.21 (1H, t, J=7.20 Hz), 4.37 (2H, d, J=6.82 Hz), 7.35-7.44 (10H, m).