Short-RInChIKey=SA-FUHFF-UHFFFADPSC-NIQVJDCFQX-UHFFFADPSC-NUHFF-MUHFF-NUHFF-ZZZ

Triphenylphosphine (519 mg, 1.98 mmol, 5.00 equiv) was dissolved in dry methylene chloride (2.0 mL) at 21 °C. Then dimethyl 4,4'-(2-(bromomethyl)-3-methylquinoxaline-6,7-diyl)dibenzoate (200 mg, 396 μmol, 1.00 equiv) dissolved in dry methylene chloride (2.00 mL) was added drop-wise at 21 °C and the mixture was stirred under argon for 12 h.