(R)-4-((R)-1-((1-cyclopropyl-5-phenyl-1H-benzo[d]imidazol-7-yl)oxy)ethyl)pyrrolidin-2-one → tert-butyl 7-(1-cyclopropyl-7-((R)-1-((R)-5-oxopyrrolidin-3-yl)ethoxy)-1H-benzo[d]imidazol-5-yl)-4-methyl-3,4 dihydroquinoxaline-1(2H)-carboxylate

Participants

Reaction Steps

Prepared by Suzuki coupling reaction procedure, as previously described for the synthesis of (R)-4-((R)-1-((1-cyclopropyl-5-phenyl-1H-benzo[d]imidazol-7-yl)oxy)ethyl)pyrrolidin-2-one:, using instead tert-butyl 4-methyl-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydroquinoxaline-1(2H)-carboxylate (92.0 mg, 0.24 mmol) as a starting material to afford 40.0 mg (45.6%) of tert-butyl 7-(1-cyclopropyl-7-((R)-1-((R)-5-oxopyrrolidin-3-yl)ethoxy)-1H-benzo[d]imidazol-5-yl)-4-methyl-3,4 dihydroquinoxaline-1(2H)-carboxylate. LCMS-ESI+ (m/z): [M+H]+ calcd for C30H37N5O4:531.28; found 532.23.

Provenance & Evidence