Anhydrides acetylation

Acetic anhydride acetylates free hydroxyl groups without a catalyst, but esterification is smoother and more complete ia the presence of acids. For example, ia the presence of -toluenesulfonic acid [104-15-4], the heat of reaction for ethanol and acetic anhydride is —60.17 kJ/mol (—14.38 kcal/mol) (13) ... [Pg.75]

The important chemical properties of acetyl chloride, CH COCl, were described ia the 1850s (10). Acetyl chloride was prepared by distilling a mixture of anhydrous sodium acetate [127-09-3J, C2H202Na, and phosphorous oxychloride [10025-87-3] POCl, and used it to interact with acetic acid yielding acetic anhydride. Acetyl chloride s violent reaction with water has been used to model Hquid-phase reactions. [Pg.81]

Scientific name/Common name Glucan Xylan Galactan Arabinan Man nan Uronic anhydride Acetyl Lignin Ash... [Pg.321]

Acetic anhydride (acetyl oxide) is a liquid with a strong offensive odor. It is an irritating and corrosive chemical that must be handled with care. [Pg.240]

N-Methyl-N-f2-Nitroxy propyl) Nitramine. (Me2NENA N-(2-NitroxypropyI) methyl nitramine. (02N)N(CH3).(CH2CH(0N02).CH3, mw 179.16, N 23.46%, OB to C02 -66.80%, pale yellow oil, mp 22—23°, d 1.320g/cc at 25/4°, RI 1.478 at 25°. Prepn from 2-hydroxy-propylamine after nitration with 98% nitric acid at 10° by reaction of the amine-nitric acid mixt with acetic anhydride acetyl chloride at 35°. Reaction mixt poured on ice. Yield is 74%. No expl properties listed Reft 1) Beil - not found 2) Blomquist, OSRD 4134, 45 119 (1944)... [Pg.132]

Acetic anhydride, acetylation of glu conolactone with, 41, 79 acetylation of hexahydrogalhc acid with, 42, 63... [Pg.105]

Acetic anhydride Propionic anhydride Butyric anhydride Maleic anhydride Phthalic anhydride Acetyl chloride Propionyi chloride Butyryl chloride Hexonyl chloride Benzoyl chloride Oxalyl chloride Chloroacetyl chloride Dichloroacetyl chloride Trichloroacteyl dtloride... [Pg.329]

The acetylium ion is the strongest acid species in the acetic anhydride system, and acetyl fluoborate, which is a good conductor in liquid sulfur dioxide, is a strong acid in acetic anhydride. Acetyl fluoborate, chloride, thiocyanate, and benzene sulfonate may all be titrated as acids in acetic anhydride using sodium acetate, a strong base in that system. 08 The neutralization reaction is ... [Pg.102]

Organic acid halides/anhydrides Acetic anhydride, acetyl chloride... [Pg.60]

Acetic anhydride Acetyl chloride Alkylaluminums Allyl trichloro silane Aluminum chloride, anhydrous... [Pg.61]

Four different methods (vapour-phase acetylation using acetic anhydride, acetylation using ketene gas, liquid phase acetylation using acetic anhydride/xylene, or neat acetic anhydride) were used to acetylate pine wood chips to a variety of WPGs for the production of MUF-bonded particleboards (Nilsson etal., 1988). Composite boards were exposed to unsterile soil in fungal cellar tests. Boards made from ketene acetylated chips were not found to be resistant to decay at the maximum WPG level achieved (17 %) with a liquid acetic anhydride modification, no decay was recorded at a WPG level of c. 18 % after 12 months exposure, whereas with a vapour-phase treatment at the same WPG, evidence for decay was found. [Pg.84]

Synonyms Acetanhydride Acetyl acetate Acetic acid anhydride Acetic oxide Acetyl anhydride Acetyl ether Acetyl oxide BRN 0385737 Caswell No. 003A CCRIS 688 EINECS 203-564-8 EPA pesticide chemical code 044007 Ethanoic anhydrate Ethanoic anhydride UN 1715. [Pg.62]

Acetoxypropane, see Isopropyl acetate Acetyl acetate, see Acetic anhydride Acetyl aldehyde, see Acetaldehyde 2-(Acetylamino)fluorene, see 2-Acetylaminofluorene A-Acetyl-2-aminofluorene, see 2-Acetylaminofluorene Acetyl anhydride, see Acetic anhydride... [Pg.1456]

In this case, nitration takes place in solutions prepared by dissolving nitric acid in acetic anhydride. Acetyl nitrate is formed in these solutions ... [Pg.253]

Metal triflate Lewis acids can also be dispersed in ionic liquids for catalytic applications. Acetylation of alcohols with acetic anhydride and acetic acid has been reported with Cu(OTf)2, Yb(OTf)3, Sc(OTf)3, In(OTf)3, HfClq. (THF)2, and InCl3 in ionic liquids that consist of [BMIM] and the anions BF4, PF, or SbF 166). With lmol% acid, all the catalysts in [BMIMJPF showed >99% acetylation products in acetyl anhydride acetylation of benzyl alcohol. Sc(OTf)3 showed the best yield with recycling, with a 25% drop in yield after two cycles. A relatively long reaction period was needed to obtain a high yield (95-98%) for the acetylation of benzyl alcohol with acetic acid, indicating that the activities of the catalysts were... [Pg.193]

Nitric acid. Kerosene, Ammonium picramate. Ethanol Sodium picramate. Hydrochloric acid. Sodium nitrate Nitric acid. Diethanolamine, Acetic anhydride. Acetyl chloride. Acetone, Potassium carbonate Acetic anhydride. Hydrochloric acid. Diethanolamine, Methylene chloride. Nitric acid. Sodium bicarbonate Nitric acid. Diethanolamine, Hydrogen chloride. Sodium bicarbonate Diisopropylamine, Nitric acid... [Pg.136]

Nitric acid, Diethanolamine, Acetic anhydride, Acetyl chloride, Acetone, Potassium carbonate... [Pg.329]

ASTM E 222-94, Standard Test Methods for Hydroxyl Groups Using Acetic Anhydride Acetylation, ASTM, Philadelphia, PA, 1994. [Pg.172]

Dialkyl ethers can be cleaved by treatment with anhydrous ferric chloride in acetic anhydride.700 In this reaction both R groups are converted to acetates. Yields are moderate to high. Ethers can also be cleaved by the mixed anhydride acetyl tosylate 701... [Pg.400]

Lysine Acetic anhydride Acetylated product (—NHAc)... [Pg.608]

Cr(CO)6 react with phthalonitrile in hot 1-chloronaphthalene to precipitate the ft form of CrnPc which is readily oxidized to CrI11(Pc)OH in air.197,198 The hydroxide coordinates other ligands to form six-coordinate complexes, Crni(Pc)(OH)X (X = ROH, H20, CN, SCN, SeCN). The hydroxy group is substituted by CN in cone. KCN solution and Cri PcXChOj - is formed. Acetic anhydride acetylates Cr(Pc)(OH)(OH2) in a stepwise fashion to Cr(Pc)(OAc)(OH2) and Cr(Pc)(OAc)(HOAc). [Pg.865]

There are many methods for effecting the nitration of aromatic compounds. Reactive compounds, for example, phenol, will nitrate in dilute nitric acid, but usually more vigorous reaction conditions consisting of nitric acid (either concentrated or fuming) or nitrate salts in sulfuric acid are used. Solutions of nitric acid in other mineral acids, e.g., perchloric or phosphoric acid, have sometimes been used and can give nitro products in isomeric proportions different from those found in sulfuric acid solution. Nitric acid inorganic solvents, particularly acetic acid or acetic anhydride, has also been used frequently. In acetic anhydride acetyl nitrate rather than the nitronium ion is usually the reacting species. [Pg.217]

Aluminum chloride Succinic anhydride Acetyl chloride 4-(4-Methoxyphenyl)-2-... [Pg.557]

Acetic anhydride (acetyl oxide ethanoic anhydride) Acetone (dimethyl ketone 2-propanone) Acetonitrile (methyl cyanide) Strong eye and upper respiratory tract irritation, and corrosive action Slight eye, nose, and throat irritation, and narcosis Respiratory irritation and cyanide... [Pg.425]

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