Under　the　reaction　conditions　of　Pd(PPh3)(4)　(2.5　mol　%)　and　PPh3　(10　mol　%)　in　EtOAc　at　60　degrees　C,　the　formal　(5　+　6)　cycloaddition　of　vinylethylene　carbonates　with　isatoic　anhydrides　proceeded　smoothly　and　furnished　medium-sized　N,O-containing　heterocycles　in　reasonable　chemical　yields.　The　chemical　structures　of　the　title　products　were　clearly　identified　by　X-ray　diffraction　analysis.