2-Propen-1 -one, 3-

Table 4.16 Micellar catalysis of Diels-Alder reactions of cyclopentadiene (1) with 3-ip-substituted phenyl)-1-(2-propen-1-one (113) in water at 25 °C. Relative rate constants (krt ) to the reactions performed in sole water...

As actually carried out the mixed aldol condensation product 1 3 diphenyl 2 propen 1 one has been isolated in 85% yield on treating benzaldehyde with ace tophenone in an aqueous ethanol solution of sodium hydroxide at 15-30°C... 

See 1,3-Di[bis(cyclopentadienyl)iron]-2-propen-1-one Perchloric acid, etc. See other organometallic perchlorates... 

Cyclopentadienylsodium, 1855 //-Cyclopcntadicnyltrimcthyl titanium. 3038 Diaquabis(cyclopentadienyl)titanium dichromate, 3327 1,3 -Di[bis(cyclopentadienyl)iron] -2-propen-1 -one, 3840... 

Q7H17N03 l-(2-Hydroxy-5-me1hylphenyl)-3-(4-methoxyphenyl)-2-propen-1-one oxime Gravimetric Extraction-photometric Cu, Ni, Pd Cu, V 3... 

Another cycloaddition to an a,(3-unsaturated compound involves the reaction of nitrile oxides with 3-methoxy- or 3-methylthio-1 -phenyl-2-propene-1 -one (Scheme 6.18) (133,134). The isoxazoles that are isolated are considered to arise from the respective intermediate isoxazolines by subsequent elimination of methanol or methanethiol. The regioselectivity observed was attributed to the presence of substituents with strong electron-donating ability, and this was accommodated in terms of the FMO theory (133,134). 

Propen-1-one, 3-(dimethy-lamino)-l-(2-pyridinyl)-, 32 47-48 [67000-34-4], lff-Pyrazole-l-ethanol, 3,5-di-methyl-, 4-methylbenzenesulfonate (ester), 32 85-86... 

A residue exploded several weeks after an attempted condensation of l,3-di(biscyclopenta-dienyliron)-2-propen-1-one with cyclopentanone at Eastman Kodak reslabs, Rochester, NY (Ref 5)... 

Basic alumina (13 g) was added to a mixture of methyl 4-formylbenzoate Id (1.00 g, 6 mmol) and acetophenone 2 (0.48 g, 4 mmol) at room temperature. (When the reactants were solid, a minimum amount (2x3 mL) of dichloro-metliane was used to dissolve them prior to the addition of the alumina.) The reaction mixture was then agitated at room temperature for 2.5 h using a Fisher vortex mixer. The product was extracted into dichloromethane (5x15 mL). Removal of the solvent, under reduced pressure, yielded the solid product. Further purification (removal of traces of benzyl alcohol and aldehyde) was carried out by recrystallization from a petroleum ether-ether mixture to afford l-phenyl-3-[4-(carbomethoxy)phenyl]-2-propen-1-one 3d (4-carbomethoxychalcone), mp 119— 120 °C (81%). 

The related transformation of 1-phenyl-2-propen-1-ones 81 (a Nazarov-type cyclization) [Eq. (5.121)] has also been studied by Shudo and co-workers.316 The acidity dependence (Table 5.25) and, in particular, the linear relationship between rates and acidity values strongly suggest the involvement of (9,0-diprotonated... 

SYNS CHALCONE, 4-METHYL-(6CI,7CI,8CI) (4-METHYLBENZYLIDENE)ACETOPHENONE p-METHYLCHALCONE 3-(4-METHYLPHENYL)-l-PHENYL-2-PROPEN-1-ONE PHENYL p-METHYLSTYRYL KETONE 2-PROPEN-l-ONE,3-(4-METHYLPHENYL)-1-PHENYI ... 

When aniline was added to ( j-l, 3-diphenyl-2-propen-1 -one (chalcone) in benzene, hexane or aniline itself, in the presence of various chiral copper(II) catalysts, optically active 1,3-diphenyl-3-(phenylamino)-l-propanone was obtained in 14-75 % yield with an optical rotation range of + 2.15 to —4.50 (c = 1.16-3.70, DMF). As the enantiomerically pure compound is not known, the optical purity of the product could not be determined. Reaction in ethanol affords optically inactive products47. 

C15H120 trans-1,3-diphenyl-2-propen-1 -one 614-47-1 62.00 1.0712 1 28325 C15H1405 bis(2-hydroxy-4-methoxyphenyl)methanone 131-54-4 25.00 1.2549 2... 

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