主权项 |
1. A compound of formula I, wherein, R is selected from the group comprising of hydrogen, alkyl, nitro, halogens (fluoro, chloro, bromo and iodo), formyl, allyl, vinyl, benzyl, acetyl, hydroxy, phenyl, substituted phenyl, fused aromatics; R′ is selected from the group consisting of hydrogen, cyanomethyl, or alkyls. Ar is selected from the group comprising of aryl or heteroaryl, which is unsubstituted or substituted with an alkyl, nitro, halogens, formyl, allyl, vinyl, benzyl, acetyl, hydroxy, phenyl, substituted phenyl, fused aromatics. |