The parent phostone, 2-ethoxy-1,2-oxaphosphorinane 2-oxide 1, and derivatives with substituents at the 3-position (methyl, phenyl, and benzyl; compounds 2-4) were convened with Lawesson's reagent to provide the corresponding ...
Two novel heterocyclic dienes, 2-ethoxy-3-phenyl-2H-oxo-1,2-oxaphosphorin 2-oxide (3) and 5-bromo-2-ethoxy-3-phenyl-2H-oxo-1,2-oxaphosphorin 2-oxide (4), are described. They were prepared in four steps starting from ...