3-[4-((E)-2-{4-[5-(4-Chloro-phenyl)-[1,3,4]oxadiazol-2-yl]-2-nitro-phenyl}-vinyl)-3,5-dimethyl-phenyl]-2,2-dimethyl-propionic acid methyl ester → 3-(4-{6-[5-(4-Chloro-phenyl)-[1,3,4]oxadiazol-2-yl]-1H-indol-2-yl}-3,5-dimethyl-phenyl)-2,2-dimethyl-propionic acid methyl ester

Participants

Reaction Steps

Slurry 3-[4-((E)-2-{4-[5-(4-chloro-phenyl)-[1,3,4]oxadiazol-2-yl]-2-nitro-phenyl}-vinyl)-3,5-dimethyl-phenyl]-2,2-dimethyl-propionic acid methyl ester (245 mg, 0.449 mmol) in triethyl phosphite (6 mL) and heat to 160° C. for 2 h under N2. Concentrate the reaction under reduced pressure. Purify the concentrate by silica gel chromatography (5-35% EtOAc/HEP) to afford 3-(4-{6-[5-(4-Chloro-phenyl)-[1,3,4]oxadiazol-2-yl]-1H-indol-2-yl}-3,5-dimethyl-phenyl)-2,2-dimethyl-propionic acid methyl ester as a yellow solid: (M+H)+ 514.3.

Provenance & Evidence