Silver salicylate

Concentrated sulfuric acid and methanol Dilute hydrochloric acid Silver nitrate 0.5 g of sample + 3 ml of reagent + heat evolves methyl salicylate (odor of wintergreen) Crystalline precipitate of salicylic acid Heavy crystalline precipitate of silver salicylate (which is soluble in boiling water and recrystallizes upon cooling)... 

The most successful insoluble silver promoters used thus far in this context have been silver silicate43 and silver zeolite.44 Other insoluble promoters described, earlier starting from a-mannosyl bromides carrying non-participating substituents at 0-2 are silver oxide,45-47 silver oxide and silver perchlorate,48 silver salicylate 49 and silver carbonate.50 The point of using an insoluble promoter together with an... 

Ethanol has also received considerable attention as a solvent over a long period of time. Data on this solvent, however, are rather few compared to methanol and very few systematic studies exist. Several solubility studies have been made since the publication of Seidell and Linke. Thomas has reported solubilities for the alkali metal iodides at 20 and 25°C, and observed a decrease in solubility with an increase in ionic radius of the cation. Deno and Berkheimer have reported the solubilities of several tetraalkylammonium perchlorates. In every case the solid phase was the pure salt. Solubilities for several rare earth compounds have been reported.Since all of these salts form solvates in the solid phase, the results cannot be used in thermodynamic calculations without the corresponding thermodynamic values for the solid phases. Solubilities of silver chloride, caesium chloride, silver benzoate, silver salicylate and caesium nitrate have been measured in ethanol, using radioactive tracer techniques. Burgaud has measured the solubility of LiCl from 10.2 to 57.6°C and observed that there is a transition from the four-solvated solid phase to the non-solvated phase at 20.4°C. 

Solubility of Silver Benzoate and Silver Salicylate in Ethanol at Various Temperatures ... 

C) Silver Benzoate Activity X 10 Silver Salicylate Activity X 10 ... 

D-Glucose orthoesters of complex alcohols can be easily obtained with the help of silver salicylate Alcohols and amines can be conveniently prepared from olefins by ozonization-reduction and ozoni-zation-reductive amination respectively without isolation of intermediates Inverted amines can be obtained from optically-active alcohols through stereospecific formation of N-alkylphthalimides 3-Methoxy-l-phenyl-l-propyne has been used as starting material for the synthesis of a,/ -unsatd. carbonyl compounds through allenic di-carbanions a-Ketocarboxylic acids can be easily prepared from cyanohydrins through a Ritter reaction... 

Other first generation insoluble promoters that include silver tosylate [26], silver salicylate [27], silver imidazolate [28] and silver carbonate [29] have proved... 

Orthoacetates have been obtained in good yields from 2,3,4,6-tetra-O-acetyl-a-D-glucopyranosyl bromide and alcohols (e.g, cholesterol) in THF in the presence of silver salicylate. The presence of an intermediate oxonium ion (116), which loses THF in forming the acetoxonium ion intermediate, was inferred from... 

Salicylic acid s. Silver salicylate Salt additives... 

Saccharides s. Carbohydrates Saccharins 26, 164 27, 538 Salicylic acid s. Silver salicylate Salt additives... 

Condensation of the same N-acetylneuraminic acid synthon with benzyl 2,3,4-tri-O-benzyl-p-D-galactopyranoside in the presence of silver salicylate afforded after deprotection the potassium salt of N-acetyl-D-neuraminyl-a(2 6)-D-galactose in 48% yield (Van der Vleugel et al. 1982 b). During the coupling reaction also a few percent of the [5-isomer was formed. 

Silver-silver perchlorate EMF 834 Silver-silver picrate EMF 194-197, 834 Silver salicylate SI 66... 

Garegg s silver zeolite [87] is also a powerful promoter [82, 88-90] and has been reported to afford increased yields and P-selectivity over silver silicate [82, 91]. Other activators, including silver imidazolate [92], silver salicylate [93], and thallium zeolite [88] have also been investigated. 

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