Construction of the bicyclo [3.1. 0] hexane template of a conformationally locked carbocyclic adenosine via an olefin keto-carbene cycloaddition

~0%

~97%

~%

~95%

~80%

~48%

~70%

~%

~%

~76%

~99%

~%

~50%

~%

~%

~%

~18%