On oxidation with potassium permanganate it is converted into acetyl urea, together with other products.
It may be prepared by boiling a-dichlorpropionic acid with silver oxide; by the hydrolysis of acetyl cyanide with hydrochloric acid (J.
Pyruvic nitrile, or acetyl cyanide, CH 3 CO.
CN, may be prepared by the action of silver cyanide on acetyl chloride; or of acetyl chloride on nitrosoacetone (L.
Notwithstanding these errors, the value of the " ethyl theory " was perceived; other radicals - formyl, methyl, amyl, acetyl, &c. - were characterized; Dumas, in 1837, admitted the failure of the etherin theory; and, in company with Liebig, he defined organic chemistry as the " chemistry of compound radicals."
Thus the radical of acetic acid, acetyl,' was C 2 H 3 C 2.
The second series can be further divided 1 This must not be confused with the modern acetyl, CH3 CO, which at that time was known as acetoxyl.
Considering derivatives primarily concerned with transformations of the hydroxyl group, we may regard our typical acid as a fusion of a radical R CO - (named acetyl, propionyl, butyl, &c., generally according to the name of the hydrocarbon containing the same number of carbon atoms) and a hydroxyl group. By replacing the hydroxyl group by a halogen, acid-haloids result; by the elimination of the elements of water between two molecules, acid-anhydrides, which may be oxidized to acid-peroxides; by replacing the hydroxyl group by the group. SH, thio-acids; by replacing it by the amino group, acid-amides (q.v.); by replacing it by the group - NH NH2, acid-hydrazides.
(C 6 H 4 CO 2 H) 2 is obtained by continued heating of salicylic acid and acetyl chloride to 130140° C. It is an amorphous yellow mass which is easily soluble in alcohol.
The acetyl compound on reduction yields two of its nitrogen atoms in the form of ammonia and the third in the form of methylamine.
Glucoseoxime on warming with acetic anhydride is simultaneously acetylated and dehydrated, yielding an acetylated gluconitrile, which when warmed with ammoniacal silver nitrate loses hydrocyanic acid and is transformed into an acetyl pentose.
Bladin HC -N (Ber., 1892, 25, p. 183) by the action of acetic)NH anhydride on dicyanophenylhydrazine (formed N: CH from cyanogen and phenylhydrazine), the resulting acetyl derivative losing water and yielding phenylmethylcyanotriazole, which, on hydrolysis, gives the free acid.
Triethyl silicol, (C2H5),Si OH, is a true alcohol, obtained by condensing zinc ethyl with silicic ester, the resulting substance of composition, (C2H5)3 SiOC2H51 with acetyl chloride yielding a chloro-compound (C2H5)3SiC1, which with aqueous ammonia yields the alcohol.
Weith, Ber., 1880, 13, 1300); or in the form of its acetyl derivative by heating /3-naphthol with ammonium acetate to 270-280° C. It forms odourless, colourless plates which melt at 111-112° C. It gives no colour with ferric chloride.
It is a gas at ordinary temperature, and may be liquefied, the liquid boiling at -5° C. It combines with acetyl chloride in the presence of zinc chloride to form a ketone, which on warming breaks down into hydrochloric acid and mesityl oxide (I.
soc. chim., 18 95, (3) 1 3, p. 735); and from the syn-aldoximes by the action of acetyl chloride or acetic anhydride.
Zincke found that the products obtained by coupling a diazonium salt with a-naphthol, and by condensing phenylhydrazine with a-naphthoquinone, were identical; whilst Meldola acetylated the azophenols, and split the acetyl products by reduction in acid solution, but obtained no satisfactory results.
Acetyl acetone, CH 3 CO CH 2 CO CH 3, may be prepared by the action of aluminium chloride on acetyl chloride, or by condensing ethyl acetate with acetone in the presence of sodium (L.
Acetyl urea, NH 2 CO NH 000H 31 formed by the action of acetic anhydride on urea, crystallizes in needles which melt at 212° C. and, on heating, strongly decomposes into acetamide and cyanuric acid.
Succinic anhydride, C 2 H 4 (CO) 2 0, is obtained by heating the acid or its sodium salt with acetic anhydride; by the action of acetyl chloride on the barium salt; by distilling a mixture of succinic acid and succinyl chloride, or by heating succinyl chloride with anhydrous oxalic acid.
Quinite (cyclo-hexanediol-i 4) is prepared by reducing the corresponding ketone with sodium amalgam, cis-, and trans-modifications being obtained which may be separated by their acetyl derivatives.
The trans-acid is a racemic compound, which on heating with acetyl chloride gives the anhydride of the cis-acid.
By long heating the acid is converted into its anhydride, which, however, is obtained more readily by heating the silver salt of the acid with acetyl chloride.
Gum arabic, when heated to 150° C. with two parts of acetic anhydride, swells up to a mass which, when washed with boiling water, and then with alcohol, gives a white amorphous insoluble powder called acetyl arabin C 6 H $ (C 2 H 3 O) 2 O 5.
acetyl CoA for fatty acid biosynthesis.
acetyl choline will move the curve to the right.
Cholesterol in the liver is made by the conversion of the starting material, acetyl coenzyme A (acetyl coenzyme A (Acetyl-CoA ).
acetyl transferase gene under the control of the tat dependent promoter.
acetyl group does not effect the activity.
acetyl L-Carnitine have been shown to help nerve and muscle tissue re-grow.
The same machinery is also used for export of acetyl and other short-chain acyl groups out of the mitochondria.
benzoyl groups, an acetyl group and an oxetane ring.
However this is not the case for the chloroplast complex which plays a distinct role in supplying acetyl CoA for fatty acid biosynthesis.
Negative inotropes like acetyl choline will move the curve to the right.
Measurement of acetyl cholinesterase (AChE) activity is the primary method for measuring the effect of these pesticides on the nervous system.
Cholesterol in the liver is made by the conversion of the starting material, acetyl coenzyme A (Acetyl-CoA ).
The gene remained active by stimulating expression from a plasmid containing the chloramphenicol acetyl transferase gene under the control of the tat dependent promoter.
Acetyl and benzoyl derivatives of nicotine on hydrolysis do not yield nicotine, but an isomeric, inactive oily liquid (metanicotine).
Acetyl-salicylic acid (salacetic acid), C 6 H 4 (O 000H 3) CO 2 H, is obtained by the action of acetyl chloride on the acid or its sodium salt (K.
(C 6 H 4 CO 2 H) 2 is obtained by continued heating of salicylic acid and acetyl chloride to 130140Ã‚° C. It is an amorphous yellow mass which is easily soluble in alcohol.
Butlerow in 1864 by acting with zinc methyl on acetyl chloride (see Alcohols).
The ketoximes by the action of acetyl chloride undergo a peculiar inframolecular re-arrangement known as the Beckmann trans formation (E.
It can be prepared by distilling a mixture of dry calcium benzoate and acetate, Ca(O2CC6H5)2 + (CH3CO2)2Ca = 2CaCO3 + 2 C6H5CO.CH3, or by condensing benzene with acetyl chloride in the presence of anhydrous aluminium chloride (C. Friedel and J.
The keto-dihydrotriazoles or triazolones are obtained by the action of hydrazines on acetyl urethane (A.
It may also be prepared (in the form of its acetyl derivative) by heating a-naphthol with sodium acetate, ammonium chloride and acetic acid (A.
Weith, Ber., 1880, 13, 1300); or in the form of its acetyl derivative by heating /3-naphthol with ammonium acetate to 270-280Ã‚° C. It forms odourless, colourless plates which melt at 111-112Ã‚° C. It gives no colour with ferric chloride.
It is a gas at ordinary temperature, and may be liquefied, the liquid boiling at -5Ã‚° C. It combines with acetyl chloride in the presence of zinc chloride to form a ketone, which on warming breaks down into hydrochloric acid and mesityl oxide (I.
The same type of reaction occurs when the metal is relatively electro-positive to the added radical, for example, with ethyl isocyanide and acetyl chloride (see above); compare also AgNC --AgN(:Cl 000H 3)C -->AgCl+CH,000N.
Acetyl urea, NH 2 CO NH 000H 31 formed by the action of acetic anhydride on urea, crystallizes in needles which melt at 212Ã‚° C. and, on heating, strongly decomposes into acetamide and cyanuric acid.
Methyl acetyl urea, CH 3 NH CO NH000H 31 is formed by the action of potash on a mixture of bromine (I mol.) and acetamide (2 mols.) (A.
Gum arabic, when heated to 150Ã‚° C. with two parts of acetic anhydride, swells up to a mass which, when washed with boiling water, and then with alcohol, gives a white amorphous insoluble powder called acetyl arabin C 6 H $ (C 2 H 3 O) 2 O 5.
Acetyl choline One of the naturally occurring chemicals that transmits impulses from one nerve to another.
The syn-aldoximes or treatment with acetyl chloride readily lose water and yield nitriles; the anti-aldoximes as a rule are acetylated and do not yield nitriles.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.