HCID 57488517, compound → 1H-Indole-1-ethanol, 5-aMino-2-[1,1-diMethyl-2-(phenylMethoxy)ethyl]-6-fluoro-α-[(phenylMethoxy)Methyl]-, (αR)-

Participants

Reaction Conditions

Reaction Steps

Bis-acetonitriledichloropalladium (0.1 eq) and CuI (0.1 eq) are charged to the reactor and then suspended in a solution of (R)-1-((4-amino-2-(4-(benzyloxy)-3,3-dimethylbut-1-yn-1-yl)-5-fluorophenyl)amino)-3-(benzyloxy)propan-2-ol obtained above (1 eq) in acetonitrile (9.5 vol total). The mixture is sparged with nitrogen gas for 1 h and then is heated to 80° C. The reaction progress is monitored by HPLC and the reaction is typically complete within 1-3 h. The mixture is filtered through Celite and the cake is washed with acetonitrile. A solvent swap into ethyl acetate (7.5 vol) is performed. The ethyl acetate solution is washed with aqueous NH3—NH4Cl solution (2×2.5 vol) followed by 10% brine (2.5 vol). The ethyl acetate solution is then stirred with silica gel (1.8 wt eq) and Si-TMT (0.1 wt eq) for 6 h. After filtration, the resulting solution is concentrated down. The residual oil is dissolved in DCM/heptane (4 vol) and then purified by column chromatography. The oil thus obtained is then crystallized from 25% EtOAc/heptane (4 vol). Crystalline (R)-1-(5-amino-2-(1-(benzyloxy)-2-methylpropan-2-yl)-6-fluoro-1H-indol-1-yl)-3-(benzyloxy)propan-2-ol is typically obtained in 27-38% yield. 1H NMR (400 MHz, DMSO) δ 7.38-7.34 (m, 4 H), 7.32-7.23 (m, 6 H), 7.21 (d, 1 H, J=12.8 Hz), 6.77 (d, 1H, J=9.0 Hz), 6.06 (s, 1 H), 5.13 (d, 1H, J=4.9 Hz), 4.54 (s, 2H), 4.46 (br. s, 2 H), 4.45 (s, 2 H), 4.33 (d, 1 H, J=12.4 Hz), 4.09-4.04 (m, 2 H), 3.63 (d, 1H, J=9.2 Hz), 3.56 (d, 1H, J=9.2 Hz), 3.49 (dd, 1H, J=9.8, 4.4 Hz), 3.43 (dd, 1H, J=9.8, 5.7 Hz), 1.40 (s, 6 H).

Provenance & Evidence