Search for "Claisen condensation" in Full Text gives 29 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2012, 8, 930–940, doi:10.3762/bjoc.8.105
Beilstein J. Org. Chem. 2012, 8, 344–348, doi:10.3762/bjoc.8.38
Beilstein J. Org. Chem. 2011, 7, 794–801, doi:10.3762/bjoc.7.90
Beilstein J. Org. Chem. 2011, 7, 151–155, doi:10.3762/bjoc.7.21