(6R,7S)-7-(Naphthalen-2-yl)-1-azabicyclo[4.2.0]octan-8-one is an intermediate for the synthesis of (±)-threo-Ethylnaphthidate Hydrochloride (T433447), which is the threo-form of Ethylnaphthidate (Hydrochloride) (CAS: 2170529-69-6) which is a neuroenhancing phenidate analog.