HCID 11369822, compound → HCID 11243225, compound

Participants

Reaction Conditions

Reaction Steps

A suspension of methyltriphenylphosphonium bromide (11.4 g, 0.032 mol) in dry THF (100 mL) was cooled to 0° C. under argon. n-BuLi (2.5M, 12 mL, 0.030 mol) was added slowly. The suspension became more homogenous. The resulting clear orange solution of the ylide was stirred for another 15 min at 0° C. 2-(5-Bromo-2-chloro-4-methoxy-phenyl)-2-methyl-propionaldehyde (7.8 g, 0.027 mol) was dissolved in dry THF (50 mL) and added to ylide-solution. The mixture was stirred for 3 h/25° C. and the resulting suspension was quenched with MeOH (10 mL). The solvent was removed under reduced pressure and the crude product was purified by flash chromatography using n-heptane as eluent. Yield: 3.92 g (50%). GCMS: >99%

Provenance & Evidence