3- -l-propanone

BENZYL CHLOROMETHYL KETONE (2-Propanone, l-chloro-3-phenyl-)... 

A. Methylthio 2-propanone [2-Propanone, l-methylthio-].2 A 2-1., three-necked, round-bottomed flask is equipped with a sealed mechanical stirrer and a two-necked adapter holding a thermometer and a... 

Propanone, l-chloro-l,l,3,3,3-pentafluoro-] (b.p. 7.8° available from PCR, Inc. or Allied Chemical Corp.) are combined in a flask fitted with a dry ice condenser and a magnetic stirring bar. The refluxing mixture is stirred for 4-0 hours and then allowed to warm gradually to room temperature. The contents of the flask are extracted three times with anhydrous ether, and the combined extracts are distilled at atmospheric pressure. After the ether has been removed, continued distillation gives 22.8-28.5 g. (55-69%) of l,l,l-trichloro-3,3,3-trifluoroacetone, b.p. 83.5-84.5°, infrared (film) 1790 cm. - This compound is stored at room temperature in a tightly stoppered bottle. In the absence of reliable toxicity data, it should be handled with normal precautions. 

Propanone, 1-chloro- [78-95-5], 73 2-Propanone, l-chloro-1,1,3,3,3 penta fluoro- [79-53-8], 124 2-Propanone, l-(methylthio) [14109-72... 

Acetone, l,l,l-tnchloro-3,3,3-tnfluoro-[2-Propanone, l,l,l-tnchloro-3,3,3-tnfluoro-], 122... 

Japan A -acetylanthranilic acid, ephedrine, ergometrine, ergotamine, isosafrole, lysergic acid, 3,4-methylenedioxyphenyl-2-propanone, l-phenyl-2-propanone, piperonal, pseudoephedrine and safrole 17 December 1999... 

Bromo-3-chloro-2,2-dimethoxypropane 2-Propanone, l-bromo-3-chloro-,... 

Propanol, titanium (4+) salt, 65, 230 2-Propanone, l-bromo-3-chloro-, dimethyl acetal, 65, 32 Propargyl bromide (106-96-7), 66, 77, 79, 86... 

Aqueous mixtures containing a-hydroxyketones (3-hydroxy-2-butanone, l-hydroxy-2-propanone, l-hydroxy-2-butanone) or a-dicarbonyls (2,3-butanedione, 2,3-pentanedione) and ammonium sulfide were reacted at 25 °C for 2 hr. Among the heterocyclic flavor compounds formed were oxazoles, oxazolines, thiazoles, thiazolines and pyrazines. 2-(l-Hydroxyalkyl)-3-oxazolines and 2-( 1 -hydroxyalkyl)-3-thiazolines were major intermediate compounds identified in a-hydroxyketone systems and on the other hand, 5-hydroxy-3-oxazolines and 5-hydroxy-3-thiazolines were proposed as intermediate compounds in o-dicarbonyl systems. 

The saccharinic acid was next prepared in 32 % yield from the halogen acid (XLIII) by treatment with silver oxide, but this approach was abandoned when good results were obtained from the acetol-form-ester. Reaction of l-chloro-2-propanone (XLVII) with sodium formate produced the monoformate of l-hydroxy-2-propanone (XLIX) which, through the addition of hydrogen cyanide and hydrolysis of the resulting cyanohydrin of l-hydroxy-2-propanone (L), yielded the desired racemic saccharinic acid (Vab). 

F.19) 2-Propanone, l-(acetyloxy)-, 2-oxopropyl acetate, l-acetoxy-2-propanone, 1-hydroxy-2-propanone acetate, acetylmethyl acetate, acetol acetate, O-acetylacetol, acetoxyacetone 1592-20-1]... 

F.27) 2-Propanone, l-(l-oxopropoxy)-, 2-oxopropyl propionate, 2-oxopropylpropanoate, hydroxyacetone propionate, acetol propionate, acetonyl propanoate 72845-79-5]... 

H.68) 2-Propanone, l-(4-hydroxy-3-methylphenyl)-, l-(4-hydroxy-3-methylphenyl)propan-2-one 188659-81-8]... 

Propanone, l-(2-furanylmethoxy)-, l-(furfuryloxy)propan-2-one, l-( 2-furylmethoxy )propan-2-one, furfuryloxyacetone, acetonyl furfuryl ether [147380-69-6]... 

Propanone, l-(2-furanyl)-, l-(2-furyl)propan-2-one, furfuryl methyl ketone, 2-furylacetone, 2-acetonylfuran [6975-60-6] FEMA 2496... 

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