HCID 86618263, compound → HCID 68712999, compound

Participants

Reaction Steps

A solution of crude 6-fluoro-5-hydroxy-1-(phenylsulfonyl)-1H-indole-4-carbaldehyde (86.4 mg, 271 μmol; Intermediate 96) in THF (3 mL) was treated with MeMgBr (774 μL of a 1.4 M solution in Toluene/THF, 4 eq) at rt and stirred for 30 min. After 30 min another 2 eq and after 45 min another 4 eq. of Grignard solution were added and stirring continued for 15 min. The reaction mixture was quenched with sat. NH4Cl, extracted with EtOAc (3×), the combined org. phases washed with brine, dried and the solvent removed in vacuo to give a yellow-brownish solid (95.6 mg). This material was purified by prep. HPLC (15-45% MeCN/50 mM NH4HCO3) to yield the title compound as an yellowish solid (31.8 mg, 11% over 3 steps). MS (ESI+) for C16H14FNO4S m/z 318 (M-OH)+, 358 (M+Na)+.

Provenance & Evidence