Kurt Alder – co-discoverer of Diels-Alder reaction

Kurt Alder – co-discoverer of Diels-Alder reaction

Diels-Alder reaction can be defined as a conjugate addition reaction of a conjugated diene to an alkene (the dienophile) to produce a cyclohexene.
Article on Kurt Alder

Biography & contributions

Kurt Alder, a German chemist and Nobel laureate was born on July 10, 1902 – died on June 20, 1958. In the year of 1928 Alder in collaboration with Diels discovered reaction of dienes with quinones.

In 1943 individually Alder discovered the Alder ene reaction in organic chemistry field. Again in 1950 Otto Diels and Alder together discovered Diels-Alder reaction and shared Nobel Prize.

Diels-Alder reaction

The Diels-Alder reaction is also known as diene synthesis. It is an organic chemical reaction between a conjugated diene and a substituted alkene, to form a substituted cyclohexene system.

The Diels-Alder reaction is particularly useful in synthetic organic chemistry as a reliable method for forming 6-membered systems with good control over regio- and stereochemical properties. The synthesis contains a diene, a type of hydrocarbon with two double carbon bonds, and a dienophile. When these two compounds are joined, they create cyclic compound-with atoms arranged in a ring.

In some cases, the cyclic compound closely relates to those occurring in nature and is a basis for products such as drugs and dyes. The reaction is also important in the manufacture of plastics and rubber and in petrochemical processes.

This mechanism allowed manufacturing of affordable synthetic steroids including cortisone, morphine, and reserpine, insecticides including aldrin and dieldrin, and numerous alkaloids and polymers.

Alder ene reaction

Alder ene reaction also termed as ene reaction. Alder ene reaction is a chemical reaction between an alkene with an allylic hydrogen (the ene) and a compound containing a multiple bond (the enophile), in order to form a new σ-bond with migration of the ene double bond and 1,5 hydrogen shift.

Facts about aldrin

Aldrin is an organochlorine insecticide that was widely used until the 1970s, when it was banned in most countries. It is a colourless solid. Before the ban, it was heavily used as a pesticide to treat seed and soil. Aldrin and related "cyclodiene" pesticides became notorious as persistent organic pollutants. Aldrin is produced by combining hexachlorocyclopentadiene with norbornadiene in a Diels-Alder reaction to give adduct.

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