Gf. Lai et Wk. Anderson, A CONCISE SYNTHESIS OF A BENZIMIDAZOLE ANALOG OF MYCOPHENOLIC-ACID USING A BF3-ET2O CATALYZED AMINO-CLAISEN REARRANGEMENT, Tetrahedron letters, 34(43), 1993, pp. 6849-6852
A nine-step synthesis of the benzimidazole analogue, 2, of mycophenoli
c acid is reported involving both the BF3-Et2O catalyzed aromatic amin
o- and the ortho ester Claisen rearrangements as key steps.