Salicylic acid esters

Salicylic Acid. Ester has strong odour of oil of wintergreen. 

Table 8. Physical Properties of Salicylic Acid Esters...

Some simple benzoates are also used as antiseptic agents. Salicylic acid esters are used as antibacterial agents and pain relievers. Analgesic balms, creams. 

Salicylic acid derivatives, 22 11—25 physical properties of, 22 18t Salicylic acid esters, 22 12-17 physical properties of, 22 13-15t Salicylic acid salts... 

Ultraviolet sunscreen agents, salicylic acid esters as, 22 12, 16 Umami receptor, 24 248 Umami sensation, 11 523, 565 Umber... 

Salicylic acid esters - [SALICYLIC ACID AND RELATED COMPOUNDS] pol 21) -medicinal properties pSTERS, ORGANIC] (Vol 9)... 

The effects of [1-CD on the kinetics of hydrolysis of salicylic acid esters (199 R = Me, m-nitrophenyl and p-nitrophenyl) have been examined, as has the Smiles rearrangement of (199 R = Me). The latter was accelerated by [1-CD but its hydrolysis was not affected. Various other effects are reported for the other esters.169... 

The optically pure bis-naphthalene ortho-methoxy amide 117 cyclized to the l,4-diazepin-5-one 118 in 86% yield and with >95% ee upon refluxing in ethylenediamine for 5 h to provide the first axially chiral 1,4-diazepine derivative (Scheme 64) <2000SL1616>. This example of a type g ring closure in which the leaving group is MeOH, proceeded in lower yield with an ot/ o-hydroxy substituent, with product distribution largely redirected toward an imidazolidine derivative in which the ethylenediamine reacted solely with the ester. In the structurally simpler salicylic acid ester series, activation of the phenol as the trifluoromethanesulfonate facilitated the SnAr reaction <1995TL7595>. 

Methods of producing of acetyl salicylic acid ester of N-acetyl-p-aminophenol ... 

Ultraviolet Absorbers Salicylic acid ester Substituted benzophenone Substituted benzotriazole... 

Cellulose can also be esterified by aromatic acids. However, derivatives of any importance are only the cellulose cinnamic and salicylic acid esters. A number of nitrogen-containing esters are also known, for example, cellulose dialkyl di ami noacetate, cellulose acetate-N,N-dimethylaminoacetate, and cellulose propionate-3-morpholine butyrate. Because of the presence of basic substituents these derivatives, although water insoluble, can be dissolved in acidic solutions. Such derivatives have found use as surface coatings in photographic films and in tablets for pharmaceutical purposes. 

Intramolecular proton transfer in electronically excited transfer in, say, salicylic acid ester and other aromatic compounds leads to deexcitation of the energized electron [43-45]. In photoreduction processes, electron transfer often precedes proton transfer [46] the stability of the protonic bond is at least partially due to an n-a interaction [47]. The strength of the protonic interaction appears to be proportional to the ionization potential of the donor and is sensitive to solvent polarity [48]. These effects have hardly been touched on in biologically important transitions and represent an important new field of research. 

Almost all phenol compounds in aqueous alkaline solution display a marked bathochromic shift and usually (but not always) an increase in absorption (symbol 7i) comparison with solution in methanol, as result of ionisation. Salicylic acid [1105] is an exception the influence of the free ortho-carboxyl group predominates. Salicylic acid esters [703] display the alkali shift again. Ortho-diphenols are unstable in alkaline solution and can therefore hardly be measured. 

Acetaminosalol. 2 - li ytiroxybenzoic acid 4-(acet ylaminotphenyl ester p-aeetamidophenyl salicylate acetyl -aminophenyl salicylate acetyl -p-aminosalol p-aceiylamino-phenol salicylic acid ester phenetsal Salophen Fhenosal. C SH 3N04 mol wt 271.26. C 66.41%, H 4.83%, N 5.16%, O... 

PPE modified with end-capped with salicylic acid ester blended with SEBS, then dispersed in either PA, PEST, PEI, or PS for processability, resistance to loss of impact strength after recycling Richards White, 1994... 

The first PC compound was prepared using the 2-methanesulfonylpyrimidine (OMSP) 6 and the salicylic acid ester in DMF. The sulfonyl compound 6 was a very efficient intermediate to synthesize 2-substituted pyrimidines [8]. The meth-anesulfonyl group in 6 is easily replaced by nucleophilic reagents like 7 and 8 (Fig. 2.5.5) [7, 9, 10]. This method was generally employed to synthesize numerous analogues aiming at new herbicides, not only with a high potency but also with an enhanced crop safety. Structural modifications were first made with the skeletal structure 9 (Fig. 2.5.6) [3]. 

Nitro compounds, ar. Nitrobenzene, m-Dinitrobenzene o-Nitrophenol N-Nitramines Oxonium fluoroborate Trialky loxonium salt Trialky loxonium fluoroborate Pyrylium fluoroborate Carboxylic acid esters HCOOC Hs, p-Nitro-phenyl formate Isopropenyl acetate Salicylic acid esters Ethyl cyanoacetate Chloroformic acid esters Ethyl chloroformate, ClCOOC Hg-i Methyl trichloroacetate Diethyl oxalate Ethyl malonate... 

Salicylic acid G0-G3 Salicylic acid Salicylic acid Ester Anti-inflammatory No No No 337... 

The Smiles-mediated aryl transfer requires the presence of strong electron-withdrawing substituents such as nitro on the phenol, yet no reaction was observed with a cyano or a phosphonate group. 4-Hydroxybenzoates and 2- and 4-hydroxybenzamides are not reactive in this reaction, but salicylic acid esters give the desired Ugi-Smiles adducts in good yields. The high acidity of nitrophenols could justify their good reactivity, but the behavior of other phenols could not be simply correlated with their pKg. For instance, 4-hydroxybenzoic acid... 

Blends that resist loss of impact strength upon being subjected to recycling at temperatures T = 250-350°C (or to thermal a g at T = 50-200°C), were prepared from PPE, SBS and antioxidant/metal deactivator ( -octylamine) [30, 31]. Similarly, recyclable blends were made in two steps (1) PPE was capped with salicylic acid ester, then blended with SEBS. (2) The modified PPE was blended with SBS, ttien dispersed in a matrix resin selected from between PEI, PA, PEST, or PS [32]. 

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