Search for "syn-epoxide" in Full Text gives 3 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2019, 15, 1722–1757, doi:10.3762/bjoc.15.168
Beilstein J. Org. Chem. 2017, 13, 571–578, doi:10.3762/bjoc.13.56
Beilstein J. Org. Chem. 2011, 7, 699–716, doi:10.3762/bjoc.7.81