反应详情

To a solution of 6-(3-hydroxypropoxy)nicotinonitrile (Example 257) (0.86 g, 4.83 mmol) and ethyl [(1S)-5-hydroxy-2,3-dihydro-1H-inden-1-yl]acetate (Example 6, 0.89 g, 4.02 mmol) in THF (20 mL) was added triphenylphosphine (1.49 g, 5.63 mmol) and 1,1′-(azodicarbonyl)-dipiperidine (1.44 g, 5.63 mmol) under argon. The golden yellow mixture was stirred at rt for 18 h and concentrated under reduced pressure. The product (1.22 g, 80%) was isolated after purification by silica gel flash chromatography (2:1 hexanes/EtOAc). 1H NMR (400 MHz, CD2Cl2) δ 8.47 (dd, 1H), 7.79 (dd, 1H), 7.05 (d, 1H), 6.82 (d, 1H), 6.77 (d, 1H), 6.69 (dd, 1H), 4.56 (t, 2H), 4.16 (q, 2H), 4.11 (t, 2H), 3.51 (qt, 1H), 2.95-2.78 (m, 2H), 2.70 (dd, 1H), 2.44-2.32 (m, 2H), 2.30-2.20 (m, 2H), 1.80-1.70 (m, 1H), 1.28 (t, 3H).

1. concentrationconcentrated under reduced pressure