Suzuki, Hitomi et al. published their research in Tetrahedron Letters in 1995 | CAS: 3268-21-1

1,4-Diiodo-2,3,5,6-tetramethylbenzene (cas: 3268-21-1) belongs to iodide derivatives. Organic iodides can be alkyl, alkenyl, or alkynyl, and all of them are very reactive toward with many kinds of nucleophiles. A typical method for synthesis of aromatic iodides is diazotization of primary aromatic amines followed by treatment of potassium iodide. Aliphatic alcohols are converted to alkyl iodides by treating with hydrogen iodide.Reference of 3268-21-1

Copper-assisted displacement reaction of nonactivated iodoarenes with arenesulfinates. Convenient alternative synthesis of unsymmetrical diaryl sulfones was written by Suzuki, Hitomi;Abe, Hajime. And the article was included in Tetrahedron Letters in 1995.Reference of 3268-21-1 This article mentions the following:

In the presence of CuI in hot DMF, a variety of functionalized iodoarenes ArI (Ar = Ph, 4-MeC6H4, C6Me5, 4-PhSC6H4, etc.) undergo nucleophilic displacement reaction with sodium arenesulfinates Ar’SO2Na (Ar’ = Ph, 4-MeC6H4) to give the corresponding unsym. diaryl sulfones ArSO2Ar’ in moderate to good yields. In the experiment, the researchers used many compounds, for example, 1,4-Diiodo-2,3,5,6-tetramethylbenzene (cas: 3268-21-1Reference of 3268-21-1).

1,4-Diiodo-2,3,5,6-tetramethylbenzene (cas: 3268-21-1) belongs to iodide derivatives. Organic iodides can be alkyl, alkenyl, or alkynyl, and all of them are very reactive toward with many kinds of nucleophiles. A typical method for synthesis of aromatic iodides is diazotization of primary aromatic amines followed by treatment of potassium iodide. Aliphatic alcohols are converted to alkyl iodides by treating with hydrogen iodide.Reference of 3268-21-1

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com