Cyanide → HCID 57833595, compound

Participants

Reaction Steps

A solution of trifluoromethanesulfonic acid 9-[8-(2,2, 2-trifluoroacetyl)-8-aza-bicyclo[3.2.1]oct-3-ylidene]-9H-xanthen-4-yl ester in a deoxygenated solvent such as dimethyl formamide (0.5 to 2 M solution) may be treated with a catalytic amount of a palladium catalyst such as tetrakis(triphenylphosphine) palladium ( 0.01 to 0.1 equiv) and a cyanide source such as zinc cyanide (1.5 to 3 equiv). The mixture may be heated to 100° C. to 150° C. under an argon atmosphere for 1 to 5 hr. After cooling, the mixture may be partitioned between a saturated sodium bicarbonate solution and an organic solvent such as ethyl acetate. The organic phase may be separated, dried over an appropriate drying agent such as sodium sulfate, filtered, and evaporated. The residue may be purified over silica gel using a mixture of organic solvents or via reverse phase chromatography to yield Compound 2b.

Provenance & Evidence