Highly atom economical process for synthesis of novel co-initiator for photo-induced radical polymerisation

A process of preparation of co-initiator for photo induced radical polymerization, comprising:

• i. reacting compound of Formula 1 with compound of formula 2, in the presence of a base at room temperature yields compound of formula 3;
• ii. reacting compound of Formula 1 with compound of formula 4, in presence of a base at room temperature yields compound of formula 5;
• wherein,
• X is selected from the group comprising of O, S, N, Se and Te;
• Y is selected from the group comprising of O, S, N, Se and Te;
• wherein R1 is selected from the group consisting Hydro, alkyl, branched chain alkyl, aryl, t-butyl, methyl, cyano, o-methyl, Nitro and also comprises tert-Butyloxycarbonyl (BocHN);
• and
• various acyclic and cyclic ketones of formula 4 are selected from n=0, 1, 2, 3, 4, and R2 is selected from group comprising of OMe, Me, CN, Methyl, Cl, F, Br, NO2, OPh, OTs, allylic and the like;
• iii. reacting compound of Formula A with compound of formula 2 (ketone), in the presence of a base at room temperature yields compound of formula C;
• wherein, formula C
• X is selected from O, S, N, Se and Te;
• Y is selected from O, S, N, Se and Te;
• Wherein R1 is selected from the group consisting Hydro, alkyl, branched chain alkyl, aryl, t-butyl, methyl, cyano, o-methyl, Nitro and also comprises tert-Butyloxycarbonyl (BocHN);
• and
• R2 is selected from R2 is selected from group comprising of OMe, Me, CN, Methyl, Cl, F, Br, NO2, OPh, OTs, allylic and the like.
• iv. reacting compound of Formula X with compound of formula 2, in the presence of a base at room temperature yields compound of formula Z
• wherein in Formula Z
• X=O, N, S
• Y=O, N, S
• Ar1=p-CF3—C6H5, naphthyl
• Ar2=p-CF3—C6H5, naphthyl
• wherein, R2 is selected from group comprising of OMe, Me, CN, Methyl, Cl, F, Br, NO2, OPh, OTs, allylic and the like.