Corey-Fuchs Reaction The Corey-Fuchs reaction refers to the transformation of an aldehyde into a terminal alkyne through a two-step process: first, the aldehyde reacts with carbon tetrabromide (CBr₄) and triphenylphosphine (PPh₃) to form a dibromoolefin, which is then treated with n-butyllithium (n-BuLi) to yield the terminal alkyne. This reaction is named after the American chemists E. J. Corey and Philip L....

Corey–Seebach Reactive The Corey–Seebach reaction, also known as the Seebach Umpolung reaction, is a classic reaction that achieves nucleophilic acylation of carbonyl carbon atoms through a "polarity reversal" (Umpolung) strategy. In this reaction, an aldehyde (or ketone) first reacts with 1,3-propanedithiol to form a 1,3-dithiane intermediate, which is then lithiated...

The Corey-Winter olefin synthesis is a series of chemical reactions that convert 1,2-diols into alkenes. The process begins with the reaction of a diol with thiophosgene to form a cyclic thiocarbonate. This intermediate then undergoes deoxygenation in the presence of trimethyl phosphite, yielding the corresponding alkene. The reaction is named after the...

Darzens condensation reaction equation   The Darzens condensation, also known as the Darzens reaction or glycidic ester condensation, is a process in which a ketone or aldehyde reacts with an α-halo ester in the presence of a base to yield an α,β-epoxy ester (comm referred to as a "glycidic ester")....

The Mitsunobu reaction uses triphenylphosphine (PPh3) and diethyl azodicarboxylate (DEAD) to convert a 1° or 2° alcohol into a wide variety of final products, dependent on the mildly acidic nucleophile (H-Nuc) used. H-Nuc transfers its proton to the zwitterionic adduct formed from PPh3 attacking the DEAD. The resulting phosphonium intermediate...

Perkin Reaction Generating α,β-unsaturated carboxylic acids (cinnamic acid derivatives) in the presence of a weak base from aromatic aldehydes with the anhydrides of aliphatic carboxylic acids is known as the Perkin reaction. An enolate intermediate is made from the anhydride, which undergoes a condensation reaction with benzaldehyde, followed by an...