Borane → HCID 86687012, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of Intermediate 32d (50 mg, 62.3 μmol in THF (1.7 mL) was added borane (1M in THF, 0.12 mL, 0.12 mmol) and the mixture stirred at 60° C. After 23 h, further borane (1M in THF, 0.31 mL, 0.31 mmol) was added. After 26 h, further borane (1M in THF, 0.31 mL, 0.31 mmol) was added. After 3 d, the cooled reaction mixture was diluted with water and extracted with DCM. The combined organics were dried and concentrated in vacuo. The residue was purified by HPLC (Gemini C18 column, 20-98% MeCN in H2O, 0.1% HCO2H) to give the title compound as a white powder after freeze-drying (15 mg, 47%). LCMS (Method 5): Rt 3.64 min, m/z 532 [MH+]. 1H NMR (400 MHz, CDCl3): 1.32 (9H, s), 1.93-1.96 (3H, m), 2.02-2.07 (1H, m), 2.32 (4H, t, J 4.5), 2.38 (3H, s), 2.47 (1H, dt, J 13.0, 5.3), 2.61 (1H, ddd, J 13.0, 7.3, 5.4), 3.56-3.58 (5H, m), 3.67-3.68 (1H, m), 4.35-4.37 (1H, m), 4.98-5.02 (1H, m), 5.50 (1H, d, J 8.8), 6.27 (2H, s), 7.18-7.28 (5H, m), 7.30-7.32 (1H, m), 7.36 (2H, d, J 8.2).

Provenance & Evidence