Dimethyl Sulfoxide → 4-[4-[4-(Hydoxydiphenylmethyl)-1-piperidinyl]-1-oxobutyl]-alpha,alpha-dimethylbenzeneacetaldehyde

Participants

Reaction Conditions

Reaction Steps

Dissolve oxalyl chloride (1.57 g, 12.4 mmol) in methylene chloride (17 mL), cool to -55° C. and place under a nitrogen atmosphere. Add, by dropwise addition, a solution of dimethylsulfoxide (1.77 g, 1.61 mL) in methylene chloride (4.5 mL). Stir for 15 minutes and add, by dropwise addition, a solution of 4-[4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]-1-oxobutyl]-2,2-dimethylphenethyl alcohol (5.0 g, 10.3 mol) in methylene chloride (33 mL). Stir for 30 minutes and add, by dropwise addition, triethylamine (7.2 mL). Stir for 15 minutes and then allow to warm to -10° C. Add a solution of oxone (12.66 g) in deionized water (50 mL). Stir for 15 minutes and add methylene chloride (25 mL). Separate the organic phase, wash with brine, dry (MgSO4) and evaporate the solvent in vacuo. Purify by chromatography (ethyl acetate) to give 4-[4-[4-(Hydroxydiphenylmethyl)-1-piperidinyl]-1-oxobutyl]-α,α-dimethylbenzeneacetaldehyde.

Provenance & Evidence