HCID 178418573, compound → HCID 178490698, compound

Participants

Reaction Conditions

Reaction Steps

The product from Example 21A (450 mg, 1.28 mmol) in THF (20 mL) was treated dropwise with methylmagnesium bromide (0.85 mL, 2.55 mmol) at −40° C. The reaction was stirred at −40° C. for 1.5 hrs, quenched with saturated NH4Cl and the mixture was extracted with EtOAc (2×). The organics were combined, dried over MgSO4, filtered and concentrated. The residue was purified by column chromatography using an Analogix® Intelliflash280™ (SiO2, 10-80% ethyl acetate/hexane) to afford 220 mg (47%) of the title compound. 1H NMR (400 MHz, CDCl3) δ ppm 1.64 (d, J=6.44 Hz, 3 H) 1.67 (s, 9 H) 3.70-3.78 (m, 1 H) 3.93 (s, 3 H) 5.19 (q, J=6.44 Hz, 1 H) 6.93 (d, J=8.90 Hz, 1 H) 7.37 (dd, J=8.59, 2.76 Hz, 1 H) 7.97 (s, 1 H) 8.06 (d, J=2.76 Hz, 1 H); MS (DCI/NH4+) m/z 369 (M+H)+.

Provenance & Evidence