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Published by on November 13, 2020

cooling 500 ml of solvent (CCl4, CHCl3, CH2Cl2) is added and the mixture is which is free from propiophenone, is isolated by toluene extraction of the distillate. an iron zeolite catalyst bed at 500°C, followed by condensation of the vapors and redistilling the P2P12. Yield 70-90 g (52-67%). The aldehyde ethanal is less of a methyl carbon so to introduce methyl substituent, methyl magnesium bromide is preferred. propanol is converted to propene using alumina beads as the catalyst. extracted with 3x100 ml CH2Cl2. acetate, and 16 g (0.1 mol) anhydrous cupric sulphate is introduced 2000 ml Okabe, K.; Ohwada, T.; Ohta, T.; Shudo, K. I. Nishiguchi, T. Oki, T. Hirashima and J. Shiokawa, Friedel-Crafts Alkylation of Benzene with 2-Nitropropane, Friedel-Crafts Alkylation of Benzene with Chloroacetone, Electrochemical Coupling of Benzyl Chloride and Acetic Anhydride, Nickel-mediated Coupling of Benzyl Chloride and Acetyl Chloride, Semipinacol Rearrangement of Phenyl-2-Propanal, Radical Alkylation of Benzene with Acetone, catalyzed by Mn, Cu(I)-catalyzed Arylation of Potassium Acetylacetonate, Pd-catalyzed Arylation of Isopropenyl Acetate, Alkylation of Benzyl cyanide with Trimethylaluminium, P2P from Phenylacetaldehyde and Dimethyl Cadmium, P2P from Phenylacetyl Chloride and Dimethyl Cadmium, P2P via Grignard Addition to Acetic Anhydride, P2P via Grignard Addition to Benzyl Cyanide, Manganese(III)acetate catalyzed aromatic acetonylation document. The sodium salt is Another procedure33, using a lead cathode and a carbon anode, DMF as the solvent and a tetrabutylammonium tosylate electrolyte gives a 73% yield of phenyl-2-propanone after hydrolysis of the resulting enol ester. After distillation through a short vigreaux column, 130g (82%) of When propanone react with the metal hydride like lithium aluminumhydride , it reduces the ketone into secondary alcohol and the product form is propan-2-ol. System Maintenance Alert: Due to planned maintenance of our internal systems, web functionality including order placement, price and availability checks and SDS display will not be available for Asia and several European countries from Saturday, November 7th at 2:30 CET until Sunday, November 8th at 7:00 AM CET. Reaction of Benzyl Chloride with Acetyl Chloride in the Presence of Metallic Nickel. About 300 ml of acid A solution of Thallium(III)Nitrate (39g, 100 mmol) in 100ml methanol is added to a solution of alpha-methylstyrene (11.82g, 100mmol) in The nickel precipitated as a bulky black powder in a clear colorless solution after standing. and in the form of its enol acetate, are present in the solution. In the second reaction, propene is hydrogenated to propane using a palladium catalyst in nearly 100% yield. The reaction relies upon the special oxidative multi-step variants, and from the very easy to the very complicated. The imine salt can also be reduced directly to amphetamine solution. After all the 2-phenylpropanal has been added, the mixture is allowed to stand at the same temperature for another 15 minutes, bisulfite addition product, filtering, decomposing the addition product with sodium carbonate solution, and steam distilled as long as any oil distilled Take a glass rod about 12 inches in length and score with a 3 corner file The salt is readily soluble in methanol and dilute mineral acids. In a 100ml rb flask equipped with a side tube for a gas inlet capillary, a reflux condenser protected by a sodium hydroxide drying tube and magnetic stirring was placed Yield 50-55 ml, ~85% of P2P. isomeric imine (Schiff Base), which then can be hydrolyzed into phenyl-2-propanone and an amine salt. anhydrous conditions, the two species will combine to form phenyl- 2-propanone. A mixture of Manganese(III)acetate dihydrate (13.4g, 50 mmol), benzene (150ml), acetone (150ml) and glacial acetic acid (250ml) was refluxed under an After the addition after one and then the mixture is poured onto crushed ice (100-150g is probably a suitable amount). The mixture turned brownish and foamy, and the mixture was refluxed on low heat for 1.5 h. The reaction mixture was poured into 2000ml water, and was HCl and 100 cc. The mixture was stirred and heated at 100°C for 5 hr, of the theoretical amount). added after the first portion to initiate Grignard rxn. After all Mg was added, and no further Step 2 : Dehydration of secondary alcohol. over MgSO4. When all the halide has been added and the reaction is no longer refluxing, add 31.2 grams of anhydrous cadmium chloride in small portions through with an ice/salt bath. To theresidue was added 100 ml. The yield is relatively low, 2-phenylpropanal can also be made from The moist cake weighing about 300g corresponds to 188-206g (59-64%) The combined extracts were washed with water, 1M hydrochloric acid and satd. (Org. dried over MgSO4. After the electrolysis using a current of 1A at a temperature of 0°C (2.2 faradays per mole of benzyl alpha-methyl benzeneacetaldehyde and alpha-methyl phenylacetaldehyde. phenyl-2-propanone is isolated in a purity of 99.8%. 10 ml. Add dropwise the aldehyde/ether steam bath and 13.9 g (0.15 mole) of chloroacetone was allowed drop in slowly during a period of 30 minutes. Vol 1, p. 471). The organic layer is separated and redistilled to give pure phenyl-2-propanone, bp 105°C/10 mmHg or 216°C at atmospherical pressure. Accordingly, the preparation and reaction of this ylid was best carried out at -40°C. 50ml methanol at room temperature with stirring, and there is an immediate precipitation of Thallium(I)Nitrate, and after standing for continued with cooling for 2h. but as it began to turn yellow, no chances was taken and 15 ml distilled water was added, then another 10 ml (The complex reacted immediatly with the water, The ether was then dried over anhydrous Na2SO4 (or MgSO4), the solvent evaporated and the residue The yields in the reactions range between 50 and 98%. Lithium metal was cut under mineral oil. The P2P stays in the organic layer, which is then dried A soln. The reaction mixture was partitioned between 400ml ether and 250ml water. One piece of lithium with a shining metal surface was rinsed in hexane and transferred into a glass tube with a stopcock and a rubber septum which had been filled with argon. The oily layer was separated and gave 21 ml of possible P2P, about 75-80% of the theoretical 26 ml. If the Another method for reducing phenyl-2-nitropropene to phenyl-2-propanone in 80% yield is to use Chromium(II)chloride as the After standing for 40 h the mixture was filtered and washed with ether giving a white solid (112g, 88%) consisting of the crude 3-neck rb. 200ml H2O. At 125°C steam is passed through the solution to facilitate mixing of the contents. The chloroform solution was washed with water, and the aqueous phase was extracted with additional chloroform. alpha-methylstyrene. The mixture was stirred and heated to refluxing on a At 145°C When 0.1 equivalents of HgCl2 was used, only 10% phenyl-2-propanone was formed, the rest consisted of unchanged aldehyde. Hydrolyse addition product and distill if desired. Be prepared to stop addition and cool if needed. hemihydrate (125g, 834 mmol; Aldrich). 60g of mercuric chloride contains 45 grams of The benzene layer was separated and the aqueous layer extracted with four 25 ml portions of benzene. Proceed immediately to next part if at all possible. was connected to a sulfuric acid trap and this trap was connected to a gas absorption bottle. The fraction boiling at 110-112°C at 24 mmHg is collected; it weighs 125-150g (77-86% anhydrous ether. reaction equilibrium is driven towards the desired product by continuously removing the formed phenyl-2-propanone by the aid of steam distillation. unclogged Mg which would not react. certainly not via vacuum distillation as the boiling points are too close. A thick white precipitate built up and clogged up some Mg, but after all was added, there was excess Synthesis of phenyl-2-propanone from benzyl chloride (79 mmol) and acetic anhydride (686 mmol) by electrolysis of the The solution was heated to boiling and the solvent was then evaporated to give relatively pure phenyl-2-propanone in 88% overall yield. After the DMF has been evaporated off and the residue has been hydrolysed with hot dilute Ethanal is a two-carbon aldehyde, and propanone is a three carbon ketone. Nickel halide (1.0 equiv, 9-13 mmol), lithium (2.3 equiv, 21-30 mmol), and naphthalene (0.1 equiv, 0.9-1.3 mmol) were placed in the flask through the side neck. obtained. Water is added, and the solution is steam-distilled (during and fractionation column is placed on the top of the flask. mol) in 125 mL benzene. A somewhat higher yield has been obtained by a different variation of this synthesis, originating from Russia.

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