a Reaction conditions: 1 (0.10 mmol, 1.0 eq), 2 (0.12 mmol, 1.2 eq), Cs2CO3 (0.2 mmol, 2.0 eq), DCM (0.5 mL), r.t, 1 h. React for 12 h. Subsequently, we focus on the structure of seven-membered carbocycles. The diene 4 and sulfur ylide 2 were chosen to participated in the [4+3] domino annulation under similar conditions (Specific experimental conditions were screened by reference to SI). Surprisingly, we could obtain the carbocycles 5a (X-ray crystallographic analysis, CCDC 2145568) with the isolated yield of 90% meanwhile. This exciting result encouraged us to continue our further exploration by employing the different substitutions (Scheme 3). Electron-donating group including methyl at para 5b or meta position 5e show a good result for over 92%, 89% yield separately. The electron-withdrawing group CF3 5c could also be tolerated towards this reaction. When move the fluorine group to ortho position, there was no any product can be observed (5g). Some halogen groups (5d and 5f) performed a preferable result. Some representative heterocycles such as thiophene are also suitable for this reaction 5h. The ester group from diene and sulfur ylide showed no effect towards this reaction 5i and 5j.