Polysubstituted benzene, preparation method thereof, and method of using the same

A compound, having a formula I or I′:

• wherein:
• X represents carbon, sulfur, or oxygen;
• R1 represents a C1-16 alkyl, C2-16 alkenyl, or C2-10 alkynyl;
• R2 represents hydrogen, halogen, C1-16 alkyl, C2-16 alkenyl, or C2-10 alkynyl;
• or an aryl group or a substituted aryl group by 1-5 groups selected from halogen, C1-26 alkyl, C1-3 halogenated alkyl, O—C1-3 alkyl, hydroxyl, amino, nitro, cyano group, aldehyde group and ester group;
• or a heteroaryl group or a substituted heteroaryl group by 1-5 groups selected from halogen, C1-26 alkyl, C1-3 halogenated alkyl, O—C1-3 alkyl, hydroxyl, amino, nitro, cyano group, aldehyde group and ester group;
• the heteroaryl group is a 3-10-membered heteroaryl group comprising N, S, O, or a combination thereof;
• R3 represents C1-6 aldehyde group, C2-6 acyl group, —COOH, hydroxyl-substituted C1-6 alkyl, —CH2O—C1-6 alkyl or —CO2—C1-6 alkyl;
• R4 and R7, at each occurrence, represent hydrogen, a C1-20 alkyl, C2-36 alkenyl, or C2-10 alkynyl;
• or an aryl group or a substituted aryl group by 1-5 groups selected from halogen, C1-3 halogenated alkyl, O—C1-3 alkyl, C1-25 alkyl, hydroxyl, amino, nitro, cyano group, aldehyde group and ester group;
• R5 and R6, at each occurrence, represent hydrogen, C1-6 alkyl or C1-6 silicon;
• wherein the dotted line in formula I optionally comprises a carbon chain connecting R4 to X;
• and
• wherein the dotted line in formula I′ optionally comprises a carbon chain connecting R4 to X.