%A Eric Buck %T SYNTHETIC STUDIES TOWARDS THE SYNTHESIS OF ANATOXIN-A(S) %X Three routes toward the total synthesis of the neurotoxin anatoxin-a(s) have been explored. They focus on the assembly of the backbone utilizing both Pd(0)- and Pd(II)-mediated processes. Our current route leads to a late-stage precursor of anatoxin-a(s), hydroxy guanidine 134, in 18 steps and in 8.0% overall yield utilizing an amidoalkylation step in the key cyclization. %D 2013 %K anatoxin-a(s), guanidine, %I University of Pittsburgh %L pittir16753