Transition metal-catalyzed inert C—H annulation reaction, an efficient strategy in the field of organic chemistry, is capable of constructing a series of carbon- or heterocycle molecules. Very recently, organic chemists have commenced to employ vinylene carbonate as a carbon synthon for the efficient construction of non-substituted heterocyclic compounds, which benefits with the enriched product structure, quite simple and concise reaction system, and the sole carbonic acid as by-product. A new type of C—H [4＋2] cyclization reaction of quinazolinone with ethylene carbonate catalyzed by ruthenium is proposed, and 2,3-fused quinazolinone derivatives are obtained with good yields.

Key words: ruthenium catalysis, C—H cyclization reaction, vinylene carbonate, fused quinazolone