Sulfur is an essential component of all living cells. In plants and animals, the amino acids cysteine and methionine contain most of the sulfur, and the element is present in all polypeptides, proteins, and enzymes that contain these amino acids. Sulfur-containing compounds often show different biological activities and provide important functions in pharmaceutical industry applications. Sulfonamides, thioethers, sulfones, and penicillins are the most common scaffolds in sulfur-containing drugs. Sulfonamide drugs were the first antibiotics to be used systemically, and they…