3,4-dihydro-2H-pyran → HCID 21075359, compound

Participants

Reaction Steps

A mixture of Example 69B (0.89 g, 3.27 mmol), 3,4-dihydro-2H-pyran (1.49 mL, 16.34 mmol) and p-TsOH.H2O (5 mg) in dichloromethane (20 mL) were stirred at room temperature overnight. The reaction solution was dried with silica gel powder (15 g). 20% ethyl acetate in hexanes (1 L) was used to run flash chromatography to give the title compound (1.06 g, 91%). MS (DCI) m/z 375.13 (M+NH4)+; 1H NMR (400 MHz, CDCl3) δ ppm 1.42–1.62 (m, 4 H) 1.68 (m, 1 H) 1.79 (m, 1 H) 2.88 (t, J=6.60 Hz, 2 H) 3.45 (m, 1 H) 3.59 (m, 1 H) 3.70 (m, 1 H) 3.94 (m, 1 H) 4.58 (t, J=3.38 Hz, 1 H) 5.21 (s, 2 H) 7.03 (d, J=8.59 Hz, 1 H) 7.28–7.48 (m, 6 H) 7.77 (d, J=2.15 Hz, 1 H).

Provenance & Evidence