Isopropyl iodide → HCID 57845587, compound

Participants

Reaction Steps

1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU, 5.4 μL, 0.036 mmol) and 2-iodopropane (48 μL, 0.48 mmol) were added to a solution of acid 11c (11 mg, 0.024 mmol) in acetone (0.3 mL) at room temperature under nitrogen. After 3 days at room temperature, the reaction mixture was concentrated in vacuo. The residue was acidified with 1.0 N HCl (5 mL) extracted with EtOAc (10 mL). The organic phase was washed with brine (5 mL), dried (MgSO4), filtered and concentrated in vacuo. Purification of the residue by flash column chromatography on 3 g silica (10% MeOH/CH2Cl2, gradient) afforded 10 mg (83%) of the title compound (18). 1H NMR (500 MHz, CDCl3) δ□ppm 1.21-1.32 (m, 6 H), 1.32 (s, 3 H), 1.34 (s, 3 H), 1.75-1.80 (m, 6 H), 2.62 (ddd, J=13.91, 9.69, 6.72 Hz, 1 H), 2.71 (td, J=9.35, 5.01 Hz, 1 H), 2.84 (t, J=7.40 Hz, 2 H), 4.03 (q, J=7.09 Hz, 1 H), 4.08-4.18 (m, 1 H), 4.65 (s, 2 H), 5.17 (dt, J=12.47, 6.24 Hz, 1 H), 6.77 (d, J=3.67 Hz, 1 H), 7.08 (d, J=9.54 Hz, 2 H), 7.18 (s, 1 H), 7.60 (d, J=3.67 Hz, 1 H).

Provenance & Evidence