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The Eschweiler–Clarke reaction (also called the Eschweiler–Clarke methylation) is a chemical reaction whereby a primary (or secondary) amine is methylated using excess formic acid and formaldehyde. [1] [2] Reductive amination reactions such as this one will not produce quaternary ammonium salts, but instead will stop at the tertiary amine ...
Illustrative is the synthesis of tert-butyl isocyanide from tert-butylamine in the presence of catalytic amount of the phase transfer catalyst benzyltriethylammonium chloride. [1] Me 3 CNH 2 + CHCl 3 + 3 NaOH → Me 3 CNC + 3 NaCl + 3 H 2 O. Similar reactions have been reported for aniline. It is used to prepare secondary amines.
This secondary amine is a colorless, flammable gas with an ammonia-like odor. Dimethylamine is commonly encountered commercially as a solution in water at concentrations up to around 40%. An estimated 270,000 tons were produced in 2005. [5]
Amine. In chemistry, amines (/ ə ˈ m iː n, ˈ æ m iː n /, [1] [2] UK also / ˈ eɪ m iː n / [3]) are compounds and functional groups that contain a basic nitrogen atom with a lone pair.Formally, amines are derivatives of ammonia (NH 3 (in which the bond angle between the nitrogen and hydrogen is 107°), wherein one or more hydrogen atoms have been replaced by a substituent such as an ...
Pentaethylenehexamine (abbreviated PEHA) is an organic amine. It is composed of five ethylene groups-CH 2 CH 2 - joined together in a chain by four secondary amine groups (-NH-) and terminated on each end by primary amine groups (-NH 2). Pentaethylenehexamine is a hexadentate ligand, owing to the Lewis basicity of the six amine groups. [3]
As the most abundantly available secondary amine that is liquid at room temperature, diethylamine has been extensively deployed in chemical synthesis. Its reactions illustrate the pattern seen for many other dialkylamines. It participates in Mannich reactions involving the installation of diethylaminomethyl substituents.
Pages in category "Secondary amines" The following 119 pages are in this category, out of 119 total. This list may not reflect recent changes. 0–9. 1Z2MAP1O;
The general structure of an enamine. An enamine is an unsaturated compound derived by the condensation of an aldehyde or ketone with a secondary amine. [1] [2] Enamines are versatile intermediates. [3] [4] Condensation to give an enamine. [5] The word "enamine" is derived from the affix en-, used as the suffix of alkene, and the root amine.