Cycloaromatization via Rhodium-Vinylidene Complexes

In 1996, Ohe et al. reported the rhodium-catalyzed cycloaromatization of acyclic (Z)-3-ene-l,5-diynes 53 into the corresponding allylic benzenes 54, where the reaction 

C12H25, CH20Bn, CH2OH, CH2OCOPI1 R2 = H, Me, CH20Bn 

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