5899-19-4Relevant articles and documents
4,4′-Unsymmetrically substituted 3,3′-biphenyl alpha helical proteomimetics as potential coactivator binding inhibitors
Weiser, Patrick T.,Chang, Ching-Yi,McDonnell, Donald P.,Hanson, Robert N.
, p. 917 - 926 (2014/01/23)
A series of unsymmetrically substituted biphenyl compounds was designed as alpha helical proteomimetics with the aim of inhibiting the binding of coactivator proteins to the nuclear hormone receptor coactivator binding domain. These compounds were synthes
Photoreactions of trans-1-o-Hydroxyphenyl-2-phenylcyclopropane
Delgado, Julio,Espinos, Amparo,Jimenez, M. Consuelo,Miranda, Miguel A.,Roth, Heinz D.,Tormos, Rosa
, p. 6541 - 6546 (2007/10/03)
The photochemistry of trans-1-o-hydroxyphenyl-2-phenylcyclopropane, trans-1, was studied under a variety of experimental conditions. Direct irradiation through quartz in cyclohexane gave rise mainly to ring-expanded products, 2-phenyl-3,4-dihydro-2H-benzopyran, 2, 2-benzyl-2,3-dihydrobenzofuran, 3, and 1-o-hydroxyphenylindan, 4. The major products, 2 and 3, are rationalized by intramolecular proton transfer. However, a significant fraction of 3 is formed via ring-opening to cinnamylphenol, 5. An additional product, o-(α-cyclohexylmethyl)phenol, 7, suggests fragmentation of trans-1 and (formal) insertion of o-hydroxyphenylcarbene into cyclohexane. Direct irradiation in methanol produced methanol adducts 8 and 9 instead of 2, 3,4, or 7. Finally, acetone-sensitized irradiation of trans-1 resulted in geometric isomerization to cis-1; this result can be rationalized via a biradical intermediate.
Photochemistry of o-Allylphenol. Identification of the Minor Products and New Mechanistic Proposals
Miranda, Miguel A.,Tormos, Rosa
, p. 3304 - 3307 (2007/10/02)
The photochemistry of o-allylphenol (1) in cyclohexane has been reinvetigated.Besides the previously reported cyclic ethers 2 and 3, seven additional minor photoproducts have been detected.Spectroscopic methods, coupled with independent synthesis, have allowed their identification as 2-methylbenzofuran (5), o-propylphenol (8), the epoxide 4, the dihydroxy compound 9, the cyclohexyl ether 6, o-(cyclohexylmethyl)phenol (10), and the dimer 7.Their formation is rationalized through new mechanistic pathways, which involve initial intermolecular electron and/or proton transfer between two molecules of o-allylphenol, as well as di-?-methane rearrangement.Key intermediates appear to be radical V, carbenium ion IX, and carbene XI.This is supported by photolysis of o-allylphenyl acetate (11), which leads to the formation of a radical pair, followed by in cage recombination to the photo-Fries products 12 and 13 or, alternatively, diffusion of the radicals out of the solvent cage to afford the minor products 2, 5, and 6, identical to those obtained by photolysis of 1.