With these optimized conditions in hand, we then examined the generality of similar substrates. As shown in scheme 2, different substituent azadiene 1 was used under the standard condition. For example, Electron-donating group including paramethyl 3b (90%), para-tertiary butyl 3e (81%), meta-methoxy 3f (75%), ortho-ethyl 3h (71%) showed a satisfactory result. What's more, typical electron-withdrawing group such parafluorine 3d (45%), trifluoromethoxy 3i (52%) was also tolerated. Some halogen group, para-Cl 3c (74%), meta-Br 3g (71%). Alkyl substituted like cyclohexane 3j also showed a good yield of 68%. To our delight, the ester group from azadiene showed good compatibility similarly represent in 3k and 3I. Then, we evaluated the scope of crotonate-derived sulfur ylide (3m) by changing the ester group, which proved there is not any effect too. Replacing an ester group with a cyanide group could also trigger the reaction (3n).