Amino acid potassium salt

The reaction has heen expanded to an asymmetric thio-Michael reaction by the addition of aiylmethyl mercaptans to cyclohex-2-enone in the presence of 10 mol% of triphenylmethyl-L-cysteine (9 examples, 44-86%, ee 8-58%). Maleimides undergo Michael addition with a,a-disubstituted aldehydes (Scheme 12.10). Several catalytic systems have been tested to promote the reaction, including a- or p-amino acids, potassium salts of amino acids... 

Chemical Name 3,3-Dimethyl-7-oxo-6-[(1-oxo-2-phenoxypropyl)amino] -4-thia-1-azabicy-cyclo[3.2.0] heptane-2-carboxylic acid potassium salt... 

Photolysis, apparatus for, 55, 17 Phthalimide, N-amino- [ 1//-Isoindole-1,3-(2//)-dione, 2-amino-, 55, 115 Potassium rew-butoxide [2-Propanol, 2-methyl-, potassium salt], 55,12, 13 Potassium iodide, 55, 71 Potassium permanganate [Permanganic acid, potassium salt], 55,68 Propane, 2,2 dimethyl 1 phenyl, 55, 112 Propane, 2 isocyano-2-methyl-, 55, 96... 

Aminobenzoic acid-3-phenyl-2-propenyl ester. See Cinnamyl anthranilate p-Aminobenzoic acid potassium salt. See Potassium-p-aminobenzoate p-Aminobenzoic acid sodium salt. See Sodium aminobenzoate 2-Aminobenzothiazole CAS 136-95-8 EINECS/ELINCS 205-268-4 Synonyms 2-Aminobenzthiazole p-Aminobenzthiazole 2-Benzothiazolamine Benzothiazole, 2-amino-Empirical C7H6N2S Formula C6H4NC(NH2)S Properties Wh. or gray powd. odorless sol. in Chloroform, ether, DMSO, 95% ethanol, acetone, cone, acids sol. < 1 mg/ml in water m.w. 150.20 sp.gr. 0.5 m.p. 126-132 C b.p. dec. distills without decomp. 

Dodecylbenzenesulfonic acid, compd. with 1-amino-2-propanol (1 1). SeeMIPA-dodecylbenzenesulfonate Dodecylbenzenesulfonic acid, compd. with 2,2 -iminodiethanol (1 1). See DEA-dodecylbenzene sulfonate Dodecylbenzenesulfonic acid, compd. with isopropylamine (1 1). See Isopropylamine dodecyl benzenesulfonate Dodecylbenzenesulfonic acid, compd. with 2,2, 2"-nitrilotris[ethanol] (1 1). SeeTEA-dodecyl benzenesulfonate Dodecylbenzenesulfonic acid, compd. with 2-propanamine (1 1). See Isopropylamine dodecyl benzenesulfonate Dodecylbenzene sulfonic acid, magnesium salt. See Magnesium dodecylbenzene sulfonate Dodecylbenzenesulfonic acid, potassium salt. See Potassium dodecylbenzene sulfonate Dodecylbenzenesulfonic acid sodium salt. See Sodium dodecylbenzenesulfonate Dodecylbenzenesulfonic acid triethanolamine salt. See TEA-dodecyl benzenesulfonate Dodecyl benzotriazole CAS 3663-25-0... 

Alkanolamines can be oxidized with various oxidiziag agents. With acidic potassium permanganate or excess potassium hydroxide, the potassium salts of the corresponding amino acid are obtained... 

FIGURE 8.8 Effect of salt on retention of amino acids. Column and flow rate Same as Fig. 8.1. Mobile phase 10 mM potassium phosphate + sodium sulfate (as noted), pH 3.0, with 50 m/VI HFIP. 

Nitrogen sources include proteins, such as casein, zein, lactalbumin protein hydrolyzates such proteoses, peptones, peptides, and commercially available materials, such as N-Z Amine which is understood to be a casein hydrolyzate also corn steep liquor, soybean meal, gluten, cottonseed meal, fish meal, meat extracts, stick liquor, liver cake, yeast extracts and distillers solubles amino acids, urea, ammonium and nitrate salts. Such inorganic elements as sodium, potassium, calcium and magnesium and chlorides, sulfates, phosphates and combinations of these anions and cations in the form of mineral salts may be advantageously used in the fermentation. 

A 0-9% salt solution is considered to be isotonic with blood. Other electrolytes present include bicarbonate ions (HCOj ) and small amounts of potassium, calcium, magnesium, phosphate, sulphate and organic acid ions. Included among the complex compounds and present in smaller amounts are phospholipids, cholesterols, natural fats, proteins, glucose and amino acids. Under normal conditions the extracellular body fluid is slightly alkaline with a pH of 7-4. ... 

In salt substitutes, the metallic or bitter taste of potassium chloride is often masked by other ingredients, such as the amino acid L-lysine, tricalcium phosphate, citric acid, and glutamic acid. 

The reaction of amino acid imidazolides with the potassium salt of monomethyl malonate in the presence of one equivalent of MgCl2, CoCl2, or MnCl2 results in the formation of jS"keto-y-aminocarboxylates.[64]... 

The base and acid hydrolysis of. syrw-triazine mononitriles has been studied <06CHE642>. The potassium salt of 2-amino-4-methoxy-6-dinitromethyl-l,3,5-triazines 30 with N204 afforded the nitroformaldoximes 31 and the 1,2,5-oxadiazole iV-oxides 32 <06CHE1096> <06CHE557>. 

VV Suresh Babu, HN Gopi. Rapid and efficient synthesis of peptide fragments containing a-aminoisobutyric acid using Fmoc-amino acid chlorides/potassium salt of 1-hydroxybenzotriazole. Tetrahedron Lett 39, 1049, 1998. 

Mildly basic liquiddiquid conditions with a stoichiometric amount of catalyst prevent hydrolysis during alkylation [101] and, more recently, it has been established that solid-liquid or microwave promoted reactions of dry materials are more effective for monoalkylation [102-106] of the esters and also permits dialkylation without hydrolysis. Soliddiquid phase-transfer catalytic conditions using potassium f-butoxide have been used successfully for the C-alkylation of diethyl acetamido-malonate and provides a convenient route to a-amino acids [105, 107] use of potassium hydroxide results in the trans-esterification of the malonate, resulting from hydrolysis followed by O-alkylation. The rate of C-alkylation of malonic esters under soliddiquid phase-transfer catalytic conditions may be enhanced by the addition of 18-crown-6 to the system. The overall rate is greater than the sum of the individual rates observed for the ammonium salt or the crown ether [108]. 

Fischer polypeptide synthesis org chem A synthesis of peptides in which a-amino acids or those peptides with a free amino group react with acid halides of a-haloacids, followed by amination with ammonia. fish-ar pal-e pep,tTd. sin tha sas ) Fischer projection orgchem) A method for representing the spatial arrangement of groups around chiral carbon atoms the four bonds to the chiral carbon are represented by a cross, with the assumption that the horizontal bonds project toward the viewer and the vertical bonds away from the viewer fish-ar pra.jek-shon) Fischer s salt See cobalt potassium nitrite. fish-3rz solt)... 

Potassium methyl a-[(methoxyethylidene)amino]-p-hydroxyacrylate Propanoic acid, 2-[(1-methoxyethylidene)amino]-3-oxo-, methyl ester, ion(l-), potassium (11) (105205-36-5) Potassium tert-butoxide tert-Butyl alcohol, potassium salt (8) 2-Propanol, 2-methyl-, potassium salt (9) (865-47-4)... 

An example of the above mentioned cascade complexation of carboxylates by macrocyclic receptors containing metal ionic centers is the inclusion of oxalate by the dien dicobalt complex 9 (Martell, Mitsokaitis) [12]. Similarly, the -cyclodextrin (jS-CD) 10, modified with a zinc cation bound by a triamine side chain, encapsulates anions like 1-adamantylcarboxylate in its cavity, fixing them by combined electrostatic and hydrophobic interactions [13], Zinc s group achieved the enantioselective transport of the potassium salts of N-protected amino acids and dipeptides by making use of the cation affinity of... 

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