What is Furan?

The term "furan" refers to the class of aromatic organic compounds with a five -member ring. The furan ring consists of four carbon atoms plus one oxygen atom. Ownership of a flat structure allows a ring with six "pi-electrons" to generate a circular "circular current" above and below this plane. Two pairs of atoms of a double -bond carbon donate four of these electrons, while the remaining two electrons come from a lonely, non -shared pair located on an oxygen atom. This meets the requirement of Huckel's law that organic compounds must have 4N+2 closed loop, conjugated pi-electrons, n is a small positive integer to be aromatic.

Structurally the simplest compound that has a furan circle is in itself, called furan-c 4 o o. If the methyl group replaces the hydrogen atom on the atom of the circle two, the compound is called 2-methylfuran. When Meth isYl's group Light with this compound on the ring atom, called 3-methylfuran. A separate compound does not mean if the methyl is placed on the atom of the number four, because it would be the same as the 2-methylfuran, as observed simply by overturning the structure by 180 degrees.

There are several common methods used to synthesize the structure of the Furan ring. The paal-cnortor synthesis converts a 1.4-di-carbonyl structure, such as a di-ketene into a furan ring, using a suitable acid reactant such as phosphoric pentoxide. Side branches on the resulting furan circle may be introduced before cycling in some cases. Another older method called Feist-Bennary synthesis reacts to the A-Halocarbonyl compound with P-Dikarbonyl in the presence of the base, the most popular is pyridine. Another more modern development is the procedure of "one sweat" developed in Germany, which instead S uses sodid sodidtronger halo kyseLins to produce 3-Halofurans, which can then be adjusted to produce important derivatives.

Furans are important default materials in chemical synthesis. For example, the saturation of two double ties of the carbon-carbon produces the molecules only with individual bonds. These saturated “added products” are cyclic ethers called tetrahydrofurans. The simplest of the tetrahydrofurans is called tetrahydrofuran (THF) and is used as a solvent replacing the once used diethyle her in many organok's reactions. Other important synthetics are derived through another mechanism called "electrophilic substitution" in which one or more hydrogen atoms of the furan ring are replaced by one or more atoms or molecular fragments.