Methanol → 6-Chloro-2'-(3-chlorophenyl)-4'-(5-fluoro-2-methyl-phenyl)-2,3-dihydro-2,6'-dioxo spiro[indole-3,3'-piperidine] 1-methoxyethyl trimethylsilane

Participants

Reaction Steps

To a toluene (12 ml) solution of 1-(3-chlorophenyl)-3-trimethylsilyoxy-2-aza-1,3-butadiene prepared in example 1b in toluene (50 mL) was added E/Z-6-chloro-3-(5-fluoro-2-methyl-benzylidene)-1-(2-trimethylsilanyl-ethoxymethyl)-1,3-dihydro-indole-2-one (0.30 g, 0.72 mmol) prepared in example 146a. The reaction tube was then placed into the cavity of a focused monomode microwave reactor and the contents of the flask were irradiated for 35 min at 135° C. After the solution was cooled to room temperature, methanol (25 mL) was added. The reaction solutions were concentrated. The residue was purified by chromatography (EtOAc:CH2Cl2=1:3) to give racemic (2′S,3S,4′R)-6-chloro-2′-(3-chlorophenyl)-4′-(5-fluoro-2-methyl-phenyl)-2,3-dihydro-2,6′-dioxospiro[indole-3,3′-piperidine]-1-methoxyethyl trimethylsilane as a yellow solid (0.45 g)

Provenance & Evidence