chemistry, an iminium cation is a polyatomic ion with the general structure [R1R2C=NR3R4]+. They are common in synthetic chemistry and biology. Iminium cations...

Bis(triphenylphosphine)iminium chloride is the chemical compound with the formula [((C6H5)3P)2N]Cl, often abbreviated [(Ph3P)2N]Cl, where Ph is phenyl...

reactions, the anion is PO2Cl2−. The iminium cation [(CH3)2N=CHCl]+ is the reactive component of interest. This iminium species is a derivative of the imidoyl...

pathway. The driving force for this reaction is the electrophilicity of the iminium ion generated from the condensation of the aldehyde and amine under acid...

good leaving group for formation of the iminium ion, in accordance with its usage in iminium ion generation. Iminium ion generation from cyanomethyl groups...

compounds to form iminium ions is often unfavorable, sometimes requiring harsh dehydrating conditions. Thus, alternative methods for iminium ion generation...

and can exist as either the uronium salt (O-form) or the less reactive iminium salt (N-form). HATU was initially reported as the O-form using the original...

forming an iminium ion with carbonyl groups of α,β-unsaturated aldehydes (enals) and enones in a rapid chemical equilibrium. This iminium activation lower...

formation of the tertiary amine is more favorable, as the intermediate in iminium ion is formed without needing to protonate. Hence the treatment of a primary...

Azomethine ylides are nitrogen-based 1,3-dipoles, consisting of an iminium ion next to a carbanion. They are used in 1,3-dipolar cycloaddition reactions...

carbon dioxide and methylamine as side products. In this reaction, an iminium cation is formed as an intermediate which is reduced by the second equivalent...

An intermolecular formal [3+3] cycloaddition between an cyclic iminium chloride and cyclopentenone....

of an active enamine nucleophile) or iminium catalysis (by forming catalytic quantities of an activated iminium electrophile). This mechanism is typical...

parent amines, imines are mildly basic and reversibly protonate to give iminium salts: R2C=NR' + H+ ↽ − ⇀ {\displaystyle {\ce {<=>>}}} [R2C=NHR']+ Alternatively...

The lactol opens and produces an aldehyde, then condenses to form an iminium. Through isomerization and reduction by geissoschizine synthase 1 (GS1)...

each resonance structure, exactly one nitrogen atom is oxidized to an iminium. Typically, they form part of a nitrogenous heterocyclic system. The main...

chloride (SnCl2), hydrochloric acid (HCl) and quenching the resulting iminium salt ([R-CH=NH2]+Cl−) with water (H2O). During the synthesis, ammonium...

substituent groups may be divalent or trivalent, yielding ions such as iminium and nitrilium. A simple onium ion has a charge of +1. A larger ion that...

dehydrogenase (MTHFD2) oxidizes 5,10-methylenetetrahydrofolate to an iminium cation which in turn is hydrolyzed to produce 5-formyl-THF and 10-formyl-THF...

The mechanism of the Mannich reaction starts with the formation of an iminium ion from the amine and formaldehyde.: 140  The compound with the carbonyl...

used for the reduction of imines. These reactions occur <pH 7 because the iminium ions are the actual substrates. Reductive amination, sometimes called the...

boiling a solution of Nile blue with sulfuric acid. This process replaces an iminium group with a carbonyl group. Alternatively, Nile red and its analogs (naphthooxazine...

N-methyl group, supplied by S-adenosyl methionine (SAM), is oxidized to an iminium ion, and a cyclization to the aromatic ring occurs by virtue of the phenolic...

reaction. Secondary amines can react with DCM to yield an equilibrium of iminium chlorides and chloromethyl chlorides, which can react with a second equivalent...

any primary or secondary amine to produce resonance stabilized imine (iminium ion or imine salt). The addition of a carbanion from a CH acidic compound...

00131-1. ISBN 978-0-08-052349-1. Grieco, P. A.; Larsen, S. D. (1990). "Iminium Ion-Based Diels–Alder Reactions: N-Benzyl-2-Azanorborene" (PDF). Organic...

linear acyl derivatives from the nucleophilic abstraction reaction. An iminium ion reacts with a halonium ion formed in situ by reaction of an alkene...

Schiff base. The reaction of ninhydrin with secondary amines gives an iminium salt, which is also coloured, generally being yellow–orange. "Indan-1,2...

aldehyde and condensation with the proximal secondary amine to form an iminium species, which is subsequently reduced to the tertiary amine and yielding...

Ramirez carbodiphosphorane (Ph3P → C0 ← PPh3), and bis(triphenylphosphine)iminium cation (Ph3P → N+ ← PPh3), all of which exhibit considerably bent equilibrium...