Stereoselective synthesis of spiropiperidines as BACE-1 aspartyl protease inhibitors via late stage N-arylation of a 1,8-diazaspiro[4.5]dec-3-en-2-one pharmacophore.
2013
A stereoselective synthesis of spiropiperidine compounds, exemplified by compound 1, was developed, which was based upon the late stage N-arylation of a 1,8-diazaspiro[4.5]dec-3-en-2-one pharmacophore. Previously, compound 1 was prepared in low overall yield from piperidinone 2 via the Strecker reaction. A new route was developed, which employed the stereospecific Corey–Link reaction of an enantiomerically pure trichloromethylcarbinol to give a template compound amenable to late stage N-arylation.
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