amino group


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Related to amino group: Amino functional group

amino group,

in chemistry, functional groupfunctional group,
in organic chemistry, group of atoms within a molecule that is responsible for certain properties of the molecule and reactions in which it takes part. Organic compounds are frequently classified according to the functional group or groups they contain.
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 that consists of a nitrogen atom attached by single bonds to hydrogen atoms, alkyl groupsalkyl group
, in chemistry, group of carbon and hydrogen atoms derived from an alkane molecule by removing one hydrogen atom (see radical). The name of the alkyl group is derived from the name of its alkane by replacing the -ane suffix with -yl, e.g.
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, aryl groupsaryl group
, in chemistry, group of atoms derived from benzene or from a benzene derivative by removing one hydrogen that is bonded to the benzene ring (see radical). The simplest aryl group is phenyl, C6H5 ; it is derived from benzene.
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, or a combination of these three. An organic compound that contains an amino group is called an amine. Amines are derivatives of the inorganic compound ammoniaammonia,
chemical compound, NH3, colorless gas that is about one half as dense as air at ordinary temperatures and pressures. It has a characteristic pungent, penetrating odor.
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, NH3. When one, two, or all three of the hydrogens in ammonia are replaced by an alkyl or aryl group, the resulting compound is known as a primary, secondary, or tertiary amine, respectively. Like ammonia, the amines are weak bases because the unshared electron pair of the nitrogen atom can form a coordinate bond with a proton (see chemical bondchemical bond,
mechanism whereby atoms combine to form molecules. There is a chemical bond between two atoms or groups of atoms when the forces acting between them are strong enough to lead to the formation of an aggregate with sufficient stability to be regarded as an
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). Amines will react with a mineral acid to form an amine salt, e.g., with hydrochloric acid to form an amine hydrochloride. A water-insoluble amine can be made to dissolve by adding acid to form its water-soluble amine salt. Amines react similarly with alkyl halides to form alkyl ammonium salts. Amines can be synthesized by reacting ammonia with an alkyl halide and neutralizing the resulting alkyl ammonium salt with an alkali, e.g., sodium hydroxide. This procedure yields a mixture of primary, secondary, and tertiary amines that is easily separated into its three components by fractional distillation. Amines can also be prepared by the reaction of ammonia with an alcohol or by the reduction of any of a variety of compounds containing nitrogen in a higher oxidation state. Amines take part in many kinds of chemical reactions; in particular, they can react with an acid chloride, acid anhydride, or ester to form an amide. All reactions of amines involve bonding of an electron-deficient atom to the amino nitrogen through its unshared electron pair. One of the most important amines is anilineaniline
, C6H5NH2, colorless, oily, basic liquid organic compound; chemically, a primary aromatic amine whose molecule is formed by replacing one hydrogen atom of a benzene molecule with an amino group.
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, an aromatic amine.
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amino group

[ə′mē·nō ‚grüp]
(organic chemistry)
A functional group (-NH2) formed by the loss of a hydrogen atom from ammonia.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Other amino-acids containing primary amino group also react with FAA to form Schiff bases and elute from GC column.
The activated JEV antibodyw as then added onto the surfaces of CNPs at room temperature and then incubated for 24 hours to immobilize the JEV antibody on CNPs surfaces by allowing the formation of amide bonds between amino groups on CNPs surface and activated carboxyl groups on the JEV antibody.
The results suggest that amino group substances (in this case, MPD) have adhered and accumulated on the hydrocarbon oxides and aromatic polymers.
Scaffolds containing chitosan and silk fibroin are partially soluble in water, so a glutaraldehyde cross-linking via binding of aldehyde groups with free amino groups of chitosan and amino acids silk fibroin was performed.
First, it attracted the nucleophilic attack of substrate amino group on the Schiff-base linkage of PLP.
Although conjugation of organic (drug) molecules to peptides is ideally done while the peptide is bound to the solid support [17], the manyhydroxyl and amino groups of aminoglycosides render them poorly soluble in the organic solvents where solid phase reactions are best run.
The proposed labeling procedure utilizes the primary amino group of the PE lipids, which is the constituent of the used liposomal formulation, but most of the formulations contain only PC lipids, PEG-lipids, and cholesterol.
In conclusion, a series of jatrorrhizine derivatives with substituted amino groups linked at the 3-position were designed, synthesized, and biologically evaluated as inhibitors of acetylcholinesterase.
In IR spectrums of complex tetrafluoroborates the greatest changes are fixed in the field of valent fluctuations of organic ligands amino groups. Shift values to the low-frequency area of valent asymmetric fluctuations bands of [v.sub.as](N[H.sub.2]) ([DELTA] 180 [cm.sup.-1]) and valent symmetric fluctuations of [v.sub.s](N[H.sub.2]) ([DELTA] 150 [cm.sup.-1]) along with noticeable low-frequency shift in the range of 1590.1610 [cm.sup.-1] allow to speak about bidentate character of OPD in complex of [Cd[(OPD).sub.2]][(B[F.sub.4]).sub.2].
For this step the compound FmocNHNH[(C[H.sub.2]).sub.3]NHBoc (5) was reacted with TFA in DCM to remove the Boc protecting group, and the side-chain amino group was then converted to [N.sup.[omega]],[N.sup.[omega]]-di-Boc-guanidyl group using N,N'-di-Boc-N"-Tf-guanidine as guanylating reagent in the presence of triethyl amine [20] (Scheme 3).
where N(Lys.) is the lysine unit content in polypeptide or protein, mmol/g; N(N[H.sub.2]) is the free primary amino group content in polypeptide or protein, mmol/g; wt(Lys.) is the mass fraction of lysine in protein, %; [m.sub.w](Lys.) is the molecular weight of lysine, g/mol; m(protein) is the mass of protein in each recipe, g; m(AAEM) is the mass of AAEM in each recipe, g; [M.sub.w](AAEM) is the molecular weight of AAEM, g.
These PTMs are usually take place at amino group, hydroxyl group, carboxyl group and side chain of the amino acids.