1,5-diphenyl-l ,4-pentadien-3-one

C17H15NO 1,5-diphenyl-l,4-pentadien-3-one oxime Extraction-photometric Cu 61... 

Brij BSA Bu CBDTS CD CHIRAPHOS Cn COD Cp Cp CTAB DBA = seep.78 = bovine serum albumin = butyl = tetrasulfonated cyclobutane-DIOP, 37, see p. 17 = cyclodextrin = 2,3-bis(diphenylphosphino)butane = 1,4,7-trimethyl-1,4,7-triazacyclononane = 1,5-cyclooctadiene = r 5-cyclopentadienyl = ti5-CsMe5, r 5-pentamethylcyclopentadienyl = hexadecyltrimethylammonium bromide = 1,5-diphenyl-l, 4,-pentadiene-3-one (dibenzylideneacetone)... 

Diphenyl- l,4-pentadiene-3-ones and cyclic analogs were synthesized by Sardjiman et al. [23]. The structures and antioxidant activity (inhibition of lipid peroxidation) of these analogs are shown in Table 3. 

PdC34H28, Palladium(0), (1,5-diphenyl-l,4-pentadien-3-one)-, 28 110 O2SC7H8, Benzenesulfonic acid, 4-methyl-, rhodium complex, 27 292 02SmC28H46, Samarium(II), bis(r -... 

Three unique di-diene have been utilized by Meek (9, 10) in the preparation of Diels-Alder copolymers. Reaction of 1,8-diphenyl-octatetraene with ftts-maleimides in refluxing chloroform for several days affords high yields of polymers with softening temperatures well over 300°, but low intrinsic viscosities. The copolymerization of 1,5-di(9-anthryl)-l,4-pentadiene-3-one and anthralazine with fo s-maleimides employs the diene nature of anthracene to obtain polymers with... 

C 7H,40, l,4-pentadien-3-one, 1,5-diphenyl-, palladium complex, 28 110 CjgHtjAs, Arsine, tri]riienyl-, iron complex, 26 61... 

Ordinary Grignard reagents react with a, -unsaturated carbonyl compounds and afford both 1,2-adduct and 1,4-adduct. However, methylsulfonyhnethylmagnesium bromide or p-tolylsulfonylmethylmagnesium bromide gave only 1,2-adducts in the reaction with conjugated carbonyl compounds such as crotonaldehyde, cinnamaldehyde, trans-4-phenyl-3-buten-2-one, benzalacetophenone and l,5-diphenyl-2,4-pentadien-l-one. 

A mixture of 3,5-epidithio-l,4-diphenyl-2,4-pentadien-l-one and P2S5 refluxed 1 hr. in toluene with stirring meribicyclo-3,5-epidithio-l,4-diphenyl-2,4-pentadiene-l-thione. Y ca. 72%. F. e. s. E. Klingsberg, Am. Soc. 85, 3244 (1963). 

One example53) of these will suffice. Thus, the photochemical reactions interconverting 1, l-dicarbomethoxy-3,3,5,5-tetraphenyl-1,4-pentadiene, 1,1,2,2-tetraphenyl-3-(2, 2 -dicarbomethoxyvinyl)cyclopropane, and 1,1 -dicarbomethoxy-2,2-diphenyl-3-(2, 2 -diphenylvinyl)cyclopropane are of interest in several ways. The singlet processes provide an example typifying the treatment of many of the cases referenced above. 

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