amine

(redirected from Secondary amine)
Also found in: Dictionary, Thesaurus, Encyclopedia.

amine

 [am´in, ah´mēn]
an organic compound containing nitrogen.
biogenic amine bioamine.
sympathomimetic a's amines that mimic the actions of the sympathetic nervous system, the group includes the catecholamines and drugs that mimic their actions.
vasoactive a's amines that cause vasodilation and increase small vessel permeability, such as histamine and serotonin.

a·mine

, primary aminesecondary aminetertiary aminequaternary ammonium ion (ă-mēn', am'in), Although this word is correctly stressed on the first syllable, U.S. usage often stresses it on the last syllable.
A substance formally derived from ammonia by the replacement of one or more of the hydrogen atoms by hydrocarbon or other radicals. The substitution of one hydrogen atom constitutes a primary amine; that of two atoms, a secondary amine; that of three atoms, a tertiary amine; and that of four atoms, a quaternary ammonium ion, a positively charged ion isolated only in association with a negative ion. The amines form salts with acids.

amine

(ah-mēn´) (am´in) an organic compound containing nitrogen; any of a group of compounds formed from ammonia by replacement of one or more hydrogen atoms by organic radicals.
biogenic amine  a type of amine synthesized by plants and animals and frequently involved in signaling, e.g., neurotransmitters such as acetylcholine, catecholamines, and serotonin; others are hormones or components of vitamins, phospholipids, bacteria, or ribosomes, e.g., cadaverine, choline, histamine, and spermine.
sympathomimetic amines  amines that mimic the actions of the sympathetic nervous system, comprising the catecholamines and drugs that mimic their actions.

amine

[am′in, əmēn′]
Etymology: L, ammonia
(in chemistry) an organic derivative of ammonia in which one or more hydrogen atoms are replaced by alkyl or aryl groups.

a·mine

(ă-mēn')
A substance derived from ammonia by the replacement of one or more of the hydrogen atoms by hydrocarbon or other radicals. The substitution of one hydrogen atom constitutes a primary amine, e.g., NH2CH3; that of two atoms, a secondary amine, e.g., NH(CH3)2; that of three atoms, a tertiary amine, e.g., N(CH3)3; and that of four atoms, a quaternary ammonium ion, e.g., +N(CH3)4, a positively charged ion isolated only in association with a negative ion. The amines form salts with acids.

amine

A class of organic compounds derived from ammonia by replacing one or more of the hydrogen atoms by a member of the paraffin series or by an aromatic group. Amines occur widely in the body, and many drugs are amines.

amine

an organic base formed by replacing one or more of the hydrogen atoms of ammonia by organic groups.

a·mine

(ă-mēn') Although this word is correctly stressed on the first syllable, U.S. usage often stresses it on the last syllable as shown here.
A substance formally derived from ammonia by the replacement of one or more of the hydrogen atoms by hydrocarbon or other radicals.

amine

an organic compound containing nitrogen.

biogenic a's
amine neurotransmitters, e.g. norepinephrine, serotonin and dopamine.
direct-acting sympathomimetic a's
activate adrenergic effector cells, e.g. catecholamine, directly and do not need adrenergic nerves to exert their effects.
amine hormones
enteroendocrine cells, distributed widely in the gastric, intestinal and pancreatic tissue, synthesize peptide and amine hormones that control the secretion of digestive juices. See also apud cells.
amine precursor uptake and decarboxylation cells
toxic a's
occur in plants, e.g. cyclopamine, tyramine.
vasoactive amine
amine that causes vasodilatation and increases small vessel permeability, e.g. histamine and serotonin.
References in periodicals archive ?
Table 5: Pseudo-first-order competitive rate data for primary and corresponding secondary amines (19) Primary amine [k.
1], and a combined band of primary and secondary amine groups at 6569-6678 [cm.
The secondary amine addition product was not observed, indicating the secondary amine nucleophilicity is substantially reduced.
The Relative Reactivity of Primary and Secondary Amine Hydrogen Atoms of Aromatic Amines with Epichlorohydrin and N- and O- Glycidyl Compounds," J.
Steric hindrance and branching within the -R groups also affect the boiling point of the secondary amine.
The reason can be both the rapid formation of secondary amines as well as the increase in network interlock resulting in a decrease in the cross linking density.
To determine secondary amine mol only, same method was done after addition of salicylaldehyde (0.
1-3) are available to replace secondary amine based sulfenamides including:
23] investigated the chemistry about the curing of bifunctional epoxy resins by amine hardeners and found that a combination of an epoxide and a primary amine leads to two principal reactions; (1) the addition reaction of a primary amine hydrogen to an epoxy group to form a secondary amine and (2) the addition reaction of an amine hydrogen in the secondary amine formed by the reaction (1) to another epoxy group to create a tertiary amine.
In the second step, the formed secondary amine reacts with another epoxy group to produce a tertiary amine.
Naugard 445 white, nonstaining secondary amine for ABS, polyolefins, nylon, and polyether polyols; Naugard SA high-temperature, high-performance stabilizer; and Naugard HM11 and HM22 phenolic/amine blends.