Ethyl Acetoacetate → HCID 54092866, compound

Participants

Reaction Conditions

Reaction Steps

Ethyl acetoacetate dianion (2.6 mL of a freshly prepared 1M solution as described in Example 10) was added to a solution of 5,5-bis(4-fluorophenyl)-4-[1-(2-methoxyethoxy)methyl-1H-tetrazol-5-yl]-2,4-pentadienal (1.1 g, 2.6 mmoles) in 15 mL of tetrahydrofuran at -40° C. After stirring for 2 hours, analytical TLC eluted with 25% (v/v) ethyl acetate in hexane showed starting aldehyde and therefore, another 1.2 mL of dianion solution was added. The reaction mixture was allowed to warm to 0° C. and then quenched with 1N HCl. The mixture was extracted with methylene chloride, dried (MgSO4) and concentrated in vacuo. The residue was purified by column chromatography on silica gel eluting with 1% (v/v) methanol in methylene chloride to give 0.9 g of the title compound as an oil. MS (CI): m/e=557 for (M+H)+ ;

Provenance & Evidence