Carboxvlate

Property Methyl 3-aminothiophene-2-carboxylate Methyl 3-amino-4-methvlthiophene-2-carboxvlate... [Pg.22]

The malonic ester synthesis can also be used to prepare cydoalkane-carboxvlic acids. For example, when 1,4-dibromobutanc is treated with diethyl malonate in the presence of 2 equivalents of sodium ethoxide base, the second alkylation step occurs intrcunotecidariy to yield a cyclic product. Hydrolysis and decarboxylation then give cvclopentanecarboxylic acid. Three-, four-, five-. [Pg.857]

Metal carboxvlates M(OOCR)x Ba(OOCCH3)2, Barium acetate tri-hydrate... [Pg.37]

Hydroxyimidazoll,2-alpyrimidine-6-carboxvlates 51BSB69 59JO-C779 82IJC(B)1030... [Pg.367]

Bruice and Schmir (3) have shown that for a series of imidazole derivatives, klm depends on the base strength of the catalyst and since pKA is an approximate measure of base strength, the value of klm should increase with increase in pKA. Table I shows that this is indeed the case. Imidazole, pKA = 7.08, has a catalytic constant eight times larger than that of benzimidazole, pKA = 5.53. Bronsted and Guggenheim (2) have obtained a linear relationship between log k/ and pKA for a series of carboxylic acids in the pKA range of 2 to 5, where kB is the carboxvlate anion basic catalytic constant for the mutarotation of glucose and Ka is the acid dissociation constant of the acid. Our results for imidazole and benzimidazole fit fairly well into the Bronsted plot. [Pg.180]

UISK membranes of rod outer segments and is oriented with its carboxvl term ,, . . ... [Pg.458]

In concentrated solution 7-methylisatin-4-carboxvlic acid exhibits normal carboxylic acid dimerization, but in the solid state the lactol form 58 is present.228 Infrared studies indicate that hydrogen bonding as shown in 59 best represents the structure and mode of association of... [Pg.19]

Hydracrylic acid or -hydroxy-propionic acid A hydroxymono-carboxvlic acid... [Pg.294]

COOH carboxylic acids carboxy -carboxvlic aci(lh or -uic acid ... [Pg.1090]

Esters (Sulfinates.Sulfonates, Acetates, Acetylenic Carboxvlates) 300... [Pg.317]

Maleic anhydride condenses with 2-aminothiazole-4-carboxvlic acid giving the maleimide 107 (269) another report claims, however, that the reaction of 2-amino-4-methylthiazole with this anhydride gives the N-substituted maleamic acid (108) (Scheme 73) (270). [Pg.33]

C ftH]uN04 146726-10-5) see Trovafloxacin mesilate ethyl (2K,3/ )-3-phenyl-2-oxiranccarboxylate (CU11 202 126060-73-9) see Docetaxel ethyl 4-phenylpiperidine-4-carboxvlate (Cl4H.i,N02 77-17-8) see Anileridine Diphenoxylate ethyl 2-phcnylpropionate (C, 111402 2510-99-8) see Loxoprofen ethyl phenylpyruvate 4-nitrophenylhydrazone (C 2H 7N,04 33671-11-3) see Niinetazepam 4-ethylphenyl 2-thienyl ketone (C, H,2OS 52779-81-4) see Suprofen ethylphosphonic acid bis(dimethylamide)... [Pg.2384]

Nitriles are analogous to carboxylic acids in that both have a carbon atom with three bonds to an electronegative atom, and both contain a n bond. Thus, some reactions of nitriles and carboxvlic acids are similar. Both kinds of... [Pg.765]

How might you use an alkylation reaction to prepare ethyl I methylcyclohcxane-carboxvlate ... [Pg.863]

Phosphoric acid anhydride (Section 29.1) A substance that contains PO2PO link, analogous to the CO2CO link in carboxvlic acid anhydrides. [Pg.1247]

On the other hand, with 4,5-thiazoledicarboxylic acid the 5-carboxvl group is the more labUe (3, 5, 51) contrary to results found by other workers (52). For example. Huntress et al. (5) have shown that pyrolysis of 2-phenyI-4,5-thiazoledicarboxyIic acid (7) gives evolution of carbon dioxide and the formation of 2-phenyl-4-thiazolecarboxylic acid (8i (Scheme 5). [Pg.546]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...