Oxoacids derivatives

Most oxoacid derivatives of lead are Pb" compounds, though Pb(OAc)4 is well known and is extensively used as a selective oxidizing agent in organic chemistry.It can be obtained as... 

Step 2 If the compound is an oxoacid, derive the name of the acid from the name of the polyatomic ion that it produces, as in Toolbox D.1. In general,... 

Oxoacids derived from amino acids After a meal containing protein, the amino acids that are absorbed into the blood are largely metabolised in the liver (>70%) and muscle. Most of these are converted to oxoacids which have two main fates ... 

Some binary hydrides (e.g. those of Groups 16 and 17) behave as acids in aqueous solution, but the majority of acids are oxoacids derived from acidic oxides. This discussion is restricted to the factors influencing the production of acids or bases when oxides dissolve in water. An oxide can be acidic, amphoteric i.e. acidic or basic depending upon conditions) or basic. 

B). 108a Alternatively, a PLP-dependent elimination of the radical could be used. Another possibility is oxidative attack on the 2-oxoacids derived from the iodotyrosines. 

Bis(trifluoromethyl)oxazol-5(2//)-ones are carbonyl-group protected, carboxyl-group activated, a-oxoacid derivatives that undergo reaction with benzene-1,2-diamine to yield quinoxa-lin-2(1 7)-one or its 3-alkyl- or 3-aryl-substituted derivatives. ... 

The Biginelli reaction so combines ureas with an aldehyde and a p-oxoacid derivative to form dehydropyrimidones as shown in Scheme 1.8.5.8. 

Branched-chain-oxoacid dehydrogenase complex, which is responsible for the oxidative decarboxylation of the oxoacids derived from leucine, isoleucine and valine. Increased concentrations of all 3 branched chain amino acids and their oxoacids in urine, plasma and cerebrospinal fluid. Serum tilso contains alloiso-leucine (probably derived from isoleucine). Urine has characteristic odor. Marked cerebral degeneration apparently shortly after birth. Usually fatal within weeks or months of birth. 

Oxaloacetic acid H(X)C-CO-CHz-COOH, an oxodicarboxylic acid present in feiirly high concentrations in plants, e.g. red clover, peas. The tmion (oxa-loacetate) is an intermediate in the Tricarboxylic acid cycle (see), and O.a. is the oxoacid derived from Aspartic acid (see) by Transamination (see). The enol form of O. a. may be cis or irons hydroxymaleic acid (cis, m.p. 152 °C), and hydroxyfumaric acid (trans, m.p 184 0 [d.]). 

In 2005, Bosch s group developed highly enantioselective DKR processes on the basis of cyclocondensation reactions of chiral aminoalcohols with racemic or prochiral -oxoacid derivatives, providing in a single synthetic step the... 

Replacement of Oxygen by Other Chalcogens. Acids derived from oxoacids by replacement of oxygen by sulfur are called thioacids, and the number of replacements are given by prefixes di-, tri-, and so on. The affixes seleno- and telluro- are used analogously. 

The oxoacids of P are more numerous than those of any other element, and the number of oxoanions and oxo-salts is probably exceeded only by those of Si. Many are of great importance technologically and their derivatives are vitally involved in many biological processes (p. 528). Fortunately, the structural principles covering this extensive array of compounds are very simple and can be stated as follows ... 

Many compounds containing the P-N link can be considered formally as derivatives of the oxoacids of phosphorus and their salts (pp. 510 -31) in which there has been isoclccironic replacement of ... 

This section considers compounds in which X (Cl, Br or I) is bonded to both O and F, i.e. F XOm. Oxofluorides -OF and peroxofluorides -OOF have already been discussed (p. 638) and halogen derivatives of oxoacids, containing -OX bonds are treated in the following section (p. 883). 

The reduction of 2-oxoacids bound to different chiral auxiliaries gave the 2-hydroxyacid derivatives in a 64 to 76% yield and 42 to 86% de depending on solvent, proton donor, supporting electrolyte, temperature, and substituent R in the oxoacid. The results are in accordance with an ECE reduction of the 2-oxoamide to an enolate anion, which subsequently undergoes a face-selective protonation to the hydroxy acid [346, 347]. 

Table 8.10 The six common metabolic intermediates derived from amino acids via the catabolism of their oxoacids...

Non-essential amino acids are those that arise by transamination from 2-oxoacids in the intermediary metabolism. These belong to the glutamate family (Glu, Gin, Pro, Arg, derived from 2-oxoglutarate), the aspartate family (only Asp and Asn in this group, derived from oxaloacetate), and alanine, which can be formed by transamination from pyruvate. The amino acids in the serine family (Ser, Gly, Cys) and histidine, which arise from intermediates of glycolysis, can also be synthesized by the human body. 

This enzyme [EC 2.S.3.5], also known as succinyl-CoA 3-ketoacid CoA-transferase and 3-oxoacid CoA-transferase, catalyzes the reversible reaction of succinyl-CoA with a 3-oxo acid to produce succinate and a 3-oxo-acyl-CoA derivative. 

Other minor systems are also in use. Some are traditional, and some are very restricted in their application. These include acid nomenclature (inorganic, for oxoacids and derivatives), replacement nomenclature (mainly organic, to denote replacement of skeletal atoms in a parent rather than replacement of hydrogen atoms — oxa-aza replacement is one variant), functional class nomenclature (this is again principally organic and involves the use of type names such as alcohol, acid and ether) and subtractive nomenclatures (such as organic-deoxy and inorganic-debor). These will all be referred to briefly as appropriate. 

Antimony(V) Oxide and Derivatives 28.1L3.1 Antimony oxoacids and their salts... 

A full list of permitted alternative names for oxoacids and derived anions can be found in [Table 1-4). 

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