One advantage of the Bartoli indole synthesis is the ability to produce indoles substituted on both the carbocyclic ring and the pyrrole ring, which is difficult to do with the Leimgruber-Batcho indole synthesis.
The Bartoli indole synthesis provides a unique advantage over the Leimgruber-Batcho indole synthesis by enabling the production of indoles with substituents on both the carbocyclic ring and the pyrrole ring, making it more versatile than the Leimgruber-Batcho method.