Mixed esters

Fig. 35 Surface pressure/area isotherms for the compression/expansion cycles of diastereomeric monolayers of (R or S)-stearoylalanine methyl esters mixed 1 1 with (R or S ) stearoylserine methyl esters on a pure water subphase at 35°C. Dashed lines denote heterochiral pairs (R S or R S) and solid lines denote homochiral pairs (R R or S S ). Reprinted with permission from Arnett et a/., 1989. Copyright 1989 American Chemical Society.

The mixed carbonic anhydride procedure8-7 has been useful in the preparation of amide linkages and thiol esters. Mixed carbonic anhydrides have successfully acylated, under very mild conditions, the carb-anions derived from diethyl ethylmalonate and diethylcadmium.8 The latter gives as a product the corresponding ketone. Mixed anhydrides derived from acetic and acetylsalicylic acids give results similar to those described here.8... 

Active ester Mixed anhydride Mixed anhydride Acid azide... 

Controls consisted of untreated esters, and esters mixed with each of the reagents without heat treatment, which were then extracted as usual. 

Fatty Acids and Esters Mix a 40.0-mL (50-g) sample with 50 mL of recently boiled water and 5.0 mL of 0.5 N sodium hydroxide. Boil the mixture for 5 min, cool, add phenolphtha-lein TS, and titrate the excess alkali with 0.5 N hydrochloric acid. More than 4 mL of 0.5 N hydrochloric acid is consumed. Lead Determine as directed for Method I in the Atomic Absorption Spectrophotometric Graphite Furnace Method under Lead Limit Test, Appendix IIIB. 

Reaction of carbohydrate with quaternary ammonium hydroxide Dextran acetate Ester derivative of dextran Dextran ether esters Mixed benzyl and butyl ethers... 

The preferential solvation formed between salt and solvent molecules causes a salt effect on vapor-liquid equilibria. A method of prediction of salt effect based on the preferential solvation number was reported previously for the case in which salt was solved below the saturation level. The idea introduced in this chapter applies for salt solved in saturation. The alcohol-ester-calcium chloride system for which the preferential solvation was thought to be formed was examined. Specifically, calcium chloride dissolves readily in alcohol but only sparingly in ester. Thus, when calcium chloride is solved into alcohol-ester mixed solvent, the calcium chloride will form a preferential solvation with alcohol only. Methanol-methyl acetate, butanolr-butyl acetate, and methanol-ethyl acetate systems were selected for the mixed-solvent systems. 

SYN CYCLOPROPANECARBOXYLIC ACID, 3-(2,2-DICHLOROETHENYL)-2,2-DIMETHYL-, CYANO(3-PHENOXYPHENYL) METHYL ESTER, MIXED WITH ACETIC ACID ANHYDRIDE, 5-((2-(2-BUTOXYETHOXY) ETHOXY) METHYL)-6-PROPYL-l,3-BENZODIOXOLE, DIMETHYLBENZENE AND 1-METHYL 2-PYRROLIDIN ONE... 

SYN PHOSPHOROTHIOIC ACID-0,0-DIETHYL, 0-(p-NITROPHENYL)ESTER, mixed with compressed gas... 

PHOSPHOROTHIOIC ACID, 0,0-DIETHYL o-(4-(((((METHYLAMINO)CARBONYL)OXY)IMINO)METH YL)PHENYL)ESTER see DJW890 PHOSPHOROTHIOIC ACID, 0,0-DIETHYL-0-(4-NITROPHENYL) ESTER see PAKOOO PHOSPHOROTHIOIC ACID-0,0-DIETHYL, 0-(p-NITROPHENYL)ESTER mixed with compressed gas see PAK230... 

Octadecanoic acid, 2,3-dihydroxypropyl ester mixed with 3-hydroxy-2-[(l-oxohexadecyl)-oxy] propyl octadecanoate [8067-32-1]... 

Erythromycin esters Mixed Within reference limits or only slightly elevated (up to 1.5 times the upper reference limit) in patients with overt hepatic disease (C31, F2, F8)... 

PHOSPHOROTHIOIC ACID, 0,0-DIETHYL-0-2-(ETHYLTHI0)ETHYL ESTER, MIXED WITH 0,0-DIETHYL S-2-(ETHYLTHIO)ETHYL PHOSPHOROTHIOATE (8065-48-3) Forms explosive mixture with air (flash point 90-113°F/32-45°C in xylene solvent). Incompatible with strong oxidizers, caustics. 

C6-C12) Alkylcarboxylic acid methyl ester Caswell No. 568C EINECS 267-017-5 EPA Pesticide Chemical Code 079034 Fatty acids, Ce.i2, Me esters Fatty acids, methyl esters Methyl esters of fatty acids (C -Ci2) Methyl octanoate and methyl decanoate Octanoic acid, methyl ester mixed with methyl decanoate Off-Shoot 0. 

Synonyms mixture of m-(l-ethylpropyl) phenyl methylcarbamate and m-(l-methyl-butyl)phenyl methylcarbamate methylcar-bamic acid m-(l-methyl)butyl)phenyl ester mixed with methylcarbamic acid m-(l-ethylpropyl)phenyl ester But Metalkamate... 

Since this early work, a very large range of organic acids has been used to prepare cellulose esters, mixed esters, and ethw esters (Rouse, 1965). A typical example of considerable commercial importance is the acetylation of cellulose. As in aU esterifications of macromolecular materials, the accessibility of the hydroxyl groups to the esterilying acid is of prime importance. Reaction (11.1) represents complete esterification, a process that is probably never fuUy achieved. The identification of the esterified products is, therefore, dependent not only on the content of acetyl groups but also on the location of these groups on the macromolecular backbone. Both factors are affected by the method of preparation and the esterification conditions. 

Ratio of feedstock sulfate ester mixed acid = 3.75 2.75 (by weight)... 

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