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Topic: Amide


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In the News (Mon 17 Jun 19)

  
 Amide - Biocrawler   (Site not responding. Last check: 2007-10-11)
The amide anion is the conjugate base of ammonia, NH It is an extremely strong base, due to the extreme weakness of ammonia as a Brønsted acid.
These amides can participate in hydrogen bonding as hydrogen bond acceptors and donors, but do not ionize in aqueous solution, whereas their parent acids and amines are almost completely ionized in solution at neutral pH.
Amide linkages constitute a defining molecular feature of proteins, the secondary structure of which is due in part to the hydrogen bonding abilities of amides.
www.biocrawler.com /encyclopedia/Amide   (392 words)

  
 Amide
Specifically, an amide results from an acid, in which a carbon atom is double bonded to oxygen and also to an hydroxyl group, when the hydroxyl group is replaced by an amine.
These amides can participate in hydrogen bonding as hydrogen bond acceptors and donors, but do not ionize in aqueous solution, wheras their parent acids and amines are slightly ionised in solution.
An amide linkage is kinetically stable to hydrolysis.
www.ebroadcast.com.au /lookup/encyclopedia/am/Amide.html   (204 words)

  
 YourArt.com >> Encyclopedia >> amide   (Site not responding. Last check: 2007-10-11)
Specifically, an amide can also be regarded as a derivative of a carboxylic acid in which the hydroxyl group has been replaced by an amine or ammonia.
Amides are commonly formed from the reaction of a carboxylic acid with an amine.
This lack of basicity is discussed in the peptide bond article, and explained by the electron-withdrawing nature of the carbonyl group where the lone pair of electrons on the nitrogen is delocalized by resonance, thus forming a partial double bond with the carbonyl carbon and putting a negative charge on the oxygen.
www.yourart.com /research/encyclopedia.cgi?subject=/amide   (876 words)

  
 amide Information Center - amide
Amides are the members phentermine amide saturday of a group amides amide formation with aryl acetic acids of chemical compounds polyester amide containing amide pill a215 identification amide pharmaceutical amide pharmaceuticals nitrogen.
Unlike the hydrolysis of esters, the amide wax ebs kinetics of amide hydrolysis is amide for weight loss third order: first order with polyether block amide copolymer respect to the amide and second order with respect amide test polyoxyalkylene drugs and substituted amides amide ester phentermine 37.5 mg tab amide to hydroxide.
Amide cgrp amide essential linkages constitute a defining molecular amide anesthetics feature of proteins, the secondary carbonyl group is found in amides structure of which oleic acid amide ester is due in part to the hydrogen bonding phenolic amide abilities of amides.
www.scipeeps.com /Sci-Chemistry_Topics_A_-_An/amide.html   (334 words)

  
 amide narrative   (Site not responding. Last check: 2007-10-11)
Amides are of enormous significance in protein molecules.
Proteins are held together by amide bonds between the amino-end on one amino acid molecule, and the carboxylate-end of another amino acid molecule.
The hydrogen atoms attached to the highly electronegative nitrogen bond at one end of the amide molecule are attracted to the unshared pairs of electrons on O part of the carboxyl group of an adjacent molecule.
www.sas.upenn.edu /~roseannm/an.html   (786 words)

  
 p-AMINOBENZAMIDE (p-AMINOBENZOIC ACID AMIDE)
Amide is a group of organic chemicals with the general formula RCO-NH2 such as acetamide, where 'R' groups range from hydrogen to various linear and ring structures or a compound with a metal replacing hydrogen in ammonia such as sodium amide, NaNH
Amide is formed from of ammonia (NH) and a carboxylic acid in which a carbon atom is double bonded to oxygen and also to an hydroxyl group or by reaction of an acid chloride, acid anhydride, or ester with an amine.
An amide is hydrolyzed to yield an amine and a carboxylic acid.
www.chemicalland21.com /specialtychem/finechem/p-AMINOBENZAMIDE.htm   (232 words)

  
 Stabilized aqueous amide antimicrobial composition - Patent 4163796
The process of claim 13 wherein the halogenated amide antimicrobial is 2,2-dibromo-3-nitrilopropionamide; the nonhalogenated amide is cyanoacetamide; the halogen is bromine; the water-miscible organic solvent is polyethylene glycol, or a lower alkyl ether thereof, having a weight average molecular weight of about 200; and the quaternary ammonium or phosphonium stabilizer is methyltriphenylphosphonium bromide.
The aforementioned reduction in the decomposition rate of the halogenated amide antimicrobial is, of course, relative to the decomposition rate encountered with a corresponding aqueous antimicrobial composition in the absence of the stabilizer under the same test conditions.
In the composition of this invention, the aforementioned halogenated amide antimicrobial is dissolved in a mixture of water and a water miscible organic solvent.
www.freepatentsonline.com /4163796.html   (4793 words)

  
 Chemistry 501
The purpose of this project is to examine the boiling points of amides and determine the significance of hydrogen bonding for these substances and other intermolecular forces of attraction.
Amides naturally occur in nature and are easily derived from carboxylic acids.
The resonance structure of the amide is significant since it causes the molecule to be polar and planar.
www.sas.upenn.edu /~kealdrid/amide.html   (618 words)

  
 AMIDE Basics
AMIDE can work with and display a large number of objects simultaneous (limited only be available memory).
Each AMIDE session has a single study object, which is used for grouping together a number of related data sets, ROI's, and fiducial marks.
AMIDE tries to make an educated guess about how large the display of the data should be, by using the smallest voxel dimension from the data set with the largest voxels to correspond to a displayed pixel.
amide.sourceforge.net /help/C/ar01s02.html   (2202 words)

  
 amide - HighBeam Encyclopedia
AMIDE [amide], organic compound formed by reaction of an acid chloride, acid anhydride, or ester with an amine.
Under strong acidic conditions an amide can be hydrolyzed to yield an amine and a carboxylic acid.
Amide hydrogen--deuterium exchange: a fast tool for screening protein stabilities in chromatography.
www.encyclopedia.com /doc/1E1-amide.html   (215 words)

  
 Antiviral composition comprising glycine amide - Patent 7012129
An antiviral composition for human administration comprising monopeptidic glycine amide and a compound that inhibits replication of HIV in the presence of monopeptidic glycine amide.
The antiviral composition of claim 1, wherein said compound that inhibits replication of HIV in the presence of monopeptidic glycine amide is selected from the group consisting of nucleoside analogue reverse transcriptase inhibitors, nucleotide analogue reverse transcriptase inhibitors, non-nucleoside reverse transcriptase inhibitors, and protease inhibitors.
Glycine amide and the tripeptide amides (i.e., peptide agents) are suitable for therapeutic and prophylactic application in mammals, including man, suffering from viral infection.
www.freepatentsonline.com /7012129.html   (11905 words)

  
 Chemical & Engineering News: Latest News - Amide With A Twist
Acyclic amides have a reputation as a robust functional group.
The amide groups in small bicyclic bridgehead lactams, such as 2-quinuclidone, however, are highly twisted.
In the absence of delocalization, the bridgehead nitrogen is more basic than the typical amide nitrogen, and the functional group is far more reactive.
pubs.acs.org /cen/news/84/i24/8424notw4.html   (470 words)

  
 amide
AMIDE can open a large number of different file formats, although some of the bugs are still being ironed out of them.
Once in the main AMIDE window, the first thing that I often do is crop the volume so that less memory is needed for subsequent operations.
AMIDE has a 3D range of interest (ROI) algorithm attached that is useful for cutting off plasters and CT scanner tables.
www.orthostereo.com /amide.html   (714 words)

  
 Amide - Wikipedia, the free encyclopedia
In chemistry, an amide is one of two kinds of compounds:
Hofmann rearrangement of primary amides to primary amines.
The presence of a C=O dipole and, to a lesser extent a N-C dipole, allows amides to act as H-bond acceptors.
en.wikipedia.org /wiki/Amide   (878 words)

  
 R-5.7.8 Amides, imides, and hydrazides
N-Phenyl derivatives of primary amides are called "anilides" and may be named using the suffix "-anilide" in place of the suffix "-amide".
may be expressed as a substituent by changing the "-amide" or "-carboxamide" suffix of the amide name to "amido-" or "carboxamido-", respectively, or alternatively, by the appropriate "acylamino-" preix.
, may be named (a) on the basis of the parent hydride azane; (b) as a diacylamine, a diacylalkyl- (or aryl, etc.) amine, or a triacylamine; or (c) as alkyl (or aryl, etc.) or acyl derivatives of a primary amide (see R-5.7.8.1), diacetamide, or dibenzamide.
www.acdlabs.com /iupac/nomenclature/93/r93_543.htm   (589 words)

  
 ISU Weed Science Online - Amide wars II
There are clear differences in the K values and water solubility of the amide products, but the question should be is whether these differences are large enough to cause significant differences in performance in the field.
We do not believe that the differences among adsorptivity coefficients of the amide herbicides are large enough to cause consistent differences in their performance.
In summary, there are differences among the amide herbicides that influence their performance characteristics.
www.weeds.iastate.edu /mgmt/qtr97-1/amide.htm   (1134 words)

  
 Preparation of lysergic acid esters
In order to conduct the process, a lysergic acid amide or isolysergic acid amide or a mixture of both is dissolved in the corresponding alcohol, e.g., methanol, ethanol, n-propanol, or isopropanol.
Generally, amounts of the amide relative to the alcohol are 1-10 parts by weight, i.e., usually an excess of alcohol is utilized.
A mixture of 2.5 g of lysergic acid amide and 2.5 g of isolysergic acid amide in 500 ml of methanol is heated with 100 g of p-toluenesulfonic acid for 4 hours to 50 deg.
www.erowid.org /archive/rhodium/chemistry/lysergic.amides.html   (1102 words)

  
 Search Results for "Amide"
amide, (am´id) (KEY), organic compound formed by reaction of an acid chloride, acid anhydride, or ester with an amine.
...A synthetic amide, C14H22N2O, used chiefly in the form of its hydrochloride as a local anesthetic and antiarrhythmic agent.
...The crystalline amide of acetic acid, CH3CONH2, used as a solvent and wetting agent and in lacquers and explosives....
bartleby.com /cgi-bin/texis/webinator/sitesearch?FILTER=&query=Amide   (267 words)

  
 Amide Exchange
The backbone amide hydrogens are involved in hydrogen bonds of secondary structural elements and their exchange rates reflect structure and stability.
DXMS measures the rate at which peptide amide hydrogens exchange with the hydrogen in the water where the protein is dissolved.
Amide hydrogen exchange rates are dependant upon the pH of the solution.
www.udel.edu /chem/bahnson/chem645/websites/McAndrew   (749 words)

  
 amide pharmaceutical phentermine   (Site not responding. Last check: 2007-10-11)
amide pharmaceutical phentermine and tolerance have been demonstrated with all drugs of this class in which amide pharmaceutical phentermine phenomena.
Blood levels obtained with the 15 mg and 30 mg resin complex formulations indicated slower absorption with a reduced but prolonged peak concentration and without a significant difference amide pharmaceutical phentermine amide pharmaceutical phentermine of blood amide pharmaceutical phentermine when compared with amide pharmaceutical phentermine amide pharmaceutical phentermine doses of amide pharmaceutical phentermine hydrochloride.
The clinical amide pharmaceutical phentermine of these differences is not known.
phentermines.anva.info /amide-pharmaceutical-phentermine.html   (289 words)

  
 N-Aryl Acylureas as Intermediates in Sequential Self-Repetitive Reactions To Form Poly(amide-imide)s   (Site not responding. Last check: 2007-10-11)
This was confirmed by the trapping of isocyanate by ethylene glycol from heating of 5h in formation of bisurethane derivative of phenyl isocyanate along with amide-imide both in good yields.
Thus, we have developed a new and efficient three-step synthesis of amides from aromatic isocyanates and carboxylic acids under the influence of a CDI catalyst such as DMPO.
The reaction between the CDI and a carboxylic acid to form 0.5 mol of N-acylurea as an isolable intermediate is the second.
pubs.acs.org /cgi-bin/sample.cgi/mamobx/2006/39/i01/html/ma051827m.html   (1386 words)

  
 Sodium amide - Wikipedia, the free encyclopedia
Sodium amide induces the loss of two molecules of hydrogen bromide from a vicinal dibromoalkane to give a carbon-carbon triple bond, as in the preparation of phenylacetylene below.
Sodium amide samples which are yellow or brown in colour should be destroyed immediately: one method for destruction is the careful addition of ethanol to a suspension of sodium amide in a hydrocarbon solvent.
Sodium amide may be expected to be corrosive to the skin, eyes and mucous membranes.
en.wikipedia.org /wiki/Sodium_amide   (632 words)

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