Zerewitinoff determination

What is Zerewitinoff determination? The Zerewitinoff determination is a method to quantitatively determine the active hydrogens in a chemical substance by adding methylmagnesium iodide in pentyl ether to the solution of substrate and measuring the volume of gaseous methane evolved. The reaction was first reported by Chugaev and subsequently extended by Zerewitinoff. The method is … Read more

Zemplén deacetylation

What is Zemplén deacetylation? The Zemplén deacetylation is a reaction that was first reported by Zemplén and Kuntz in 1924. It is a useful method for the removal of O-acetyl protecting groups of carbohydrates, and it is performed by treating the O-acetylated substrates with a catalytic amount of sodium methoxide in methanol at room temperature. … Read more

Skraup quinoline synthesis

What is Skraup quinoline synthesis? The Skraup quinoline synthesis, also known as Skraup reaction or Skraup synthesis, is a chemical process for synthesizing quinoline derivatives from primary aromatic amines, glycerol, and an oxidizing agent in concentrated sulfuric acid H2SO4. While most primary aromatic amines react under Skraup reaction conditions, the initial Skraup protocol yields a low … Read more

Lobry de Bruyn-Alberda van Ekenstein transformation

What is Lobry de Bruyn-Alberda van Ekenstein transformation? The Lobry de Bruyn-Alberda van Ekenstein reaction, discovered in 1895, involves the reciprocal conversion of carbohydrates to their isomers in an alkaline solution, with the help of an enediolic intermediate. The reaction is named after its discoverers, and is also known by other names such as the … Read more

Kuhn-Roth oxidation

What is Kuhn-Roth oxidation? The Kuhn-Roth reaction, developed in 1933, is a method used for quantifying the number of methyl groups attached to the carbon atom in an organic molecule. This involves the oxidation of the organic compound with chromic acid H2CrO4 and sulfuric acid H2SO4, followed by steam distillation to collect the acetic acid … Read more

Claisen-Schmidt condensation

What is Claisen-Schmidt condensation? The Claisen-Schmidt condensation is a reaction that was first reported by Claisen (University of Bonn) and Schmidt (ETH Zurich) in 1881. It involves the condensation of an aromatic aldehyde with an aliphatic aldehyde or ketone in the presence of a base or an acid to form an α,β-unsaturated aldehyde or ketone … Read more

Traube purine synthesis

What is Traube purine synthesis? The Traube reaction, also known as the Traube purine synthesis, is a method for synthesizing purine derivatives from 4-amino-6-hydroxypyrimidine or 4,6-diaminopyrimidine. The reaction involves introducing the amino group into the 5-position of the pyrimidines through nitrosation and reduction with ammonium sulfide (NH4)2S. Ring closure is achieved using either formic acid … Read more

Bakelite process

What is Bakelite process? Phenol alcohol, also known as orthohydroxy benzyl alcohol, oxybenzylalcohol, or saligenin, was first isolated by Piria in 1843. When heated, it can be converted into a resin known as “saliretins.” The reaction between phenol and aldehyde was first reported by von Baeyer (Nobel Prize in Chemistry 1905) in 1872, who used … Read more

Freund reaction

What is Freund reaction? The Freund reaction is a process used to create alicyclic hydrocarbons by treating open chain dihalo compounds with sodium. When zinc is used instead of sodium, the reaction is known as the Gustavson reaction. In addition, the Hass cyclopropane process involves the cyclization of 1,3-dichloropropane obtained from the chlorination of propane … Read more

Organic Synthesis – solutions to problems

Go to the page with the list of problems. Organic Synthesis – solutions to problems The solutions to these Organic Synthesis problems are neither unique nor exclusive, the ones listed are some of the possible ones. Solution 1: The key to this synthesis is in the chain elongation, for this the chosen strategy is the … Read more

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