50485-27-3Relevant articles and documents
NOVEL VINYLBENZENE COMPOUND AND PHOTOSENSITIVE PHOTORESIST COMPOSITION COMPRISING THE SAME
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, (2017/07/26)
Provided is a photocurable composition comprising: (A) a photocurable compound; and (B) a vinylbenzene-containing monomer having a structure represented by chemical formula 1. In the chemical formula 1, X, R1, R2, R3, L, L1, L2 and L3 are the same as defi
The lithiation reactivity and selectivity of differentially branched alkyldiphenylphosphine oxides - A simple and versatile approach to ortho-functionalized arylphosphine oxides
Mahamulkar, Shraddha G.,Císa?ová, Ivana,Jahn, Ullrich
, p. 793 - 799 (2015/03/18)
Alkyldiphenylphosphine oxides typically undergo α-deprotonation with alkyllithium reagents. Here, the lithiation of differentially branched alkyldiphenylphosphine oxides was investigated and a diverse, but predictable reactivity was found. γ-Branched deri
Modern Friedel-Crafts chemistry. Part-29. Cyclialkylation of some triphenylated propane, butane and pentane substrates to diphenylated indans under Friedel-Crafts conditions
Khalaf, Ali A.,Awad, Ibrahim M.,El-Emary, Talaat I.,Abd El-Aal, Hassan A. K.
experimental part, p. 300 - 305 (2009/06/25)
Reactions under Friedel-Crafts cyclialkylation conditions produced : isomeric 1,2-diphenylindans from 1,2,3-triphenyl-(1- or 2-)propanol and 1-chloro-2,3,3-triphenylpropane, trans-2-benzyl-1-phenylindan from 2-benzyl-1,3-diphenyl-2-propanol, isomeric 1-me
Iodine induced transformations of alcohols under solvent-free conditions
Stavber, Gaj,Zupan, Marko,Stavber, Stojan
, p. 8463 - 8466 (2007/10/03)
Iodine has been shown to be an efficient catalyst for transformations of alcohols under solvent-free conditions. In the presence of 5% of iodine, tertiary alcohols underwent dehydration forming the corresponding alkenes, while in the case of 2-phenylpropane-2-ol cyclodimerisation to 1,1,3-trimethyl-3-phenylindane took place. Secondary and primary benzyl alcohols under the same conditions gave the corresponding ethers.
Alkene synthesis: Elimination of arenesulfinic acid from alkyl aryl sulfones using potassium trimethylsilanolate as base
Baker-Glenn, Charles A.G.,Barrett, Anthony G.M.,Gray, Andrew A.,Procopiou, Panayiotis A.,Ruston, Mark
, p. 7427 - 7430 (2007/10/03)
The use of potassium trimethylsilanolate as base to induce elimination of potassium arenesulfinate from alkyl aryl sulfones to produce E-alkenes is described. The reaction was appropriate for substrates containing a benzyl or allyl group α to the sulfone
Reactions of the Lithium Salts of the Tribenzylidenemethane Dianion, Diphenylacetone Dianion, and Related Compounds
Witt, Ortrun,Mauser, Harald,Friedl, Thomas,Wilhelm, Dieter,Clark, Timothy
, p. 959 - 967 (2007/10/03)
Potentially synthetically useful reactions of the dilithium salts of the title dianions have been investigated. Electrophilic quenching with a variety of reagents usually leads to the expected products in good yield. Quenching the diphenylacetone dianion with 1 equiv of trimethylchlorosilane, however, gives a good yield of 1,3-diphenylallene obtained by formal elimination of a trimethylsiloxy anion from an intermediate monoquenched monoanion salt. NMR studies, however, do not reveal the intermediacy of the 1,3-diphenyl-2-(trimethylsiloxy)allyl anion but rather suggest that the initial reaction site is at carbon, rather than oxygen. Oxidation of the dianions leads either to ring closure or dimerization for the tribenzylidenemethane dianion and to dimerization for the diphenylacetone dianion. The dimerization reactions are stereospecific, both with respect to the two new stereocenters produced and for the double bonds of the bis-silyl enol ether products if the dimeric bis-enolate dianion products are quenched with trimethylchlorosilane.
Synthesis, structural characterization, and reactivity of zirconium complexes containing trimethylenemethane-based ligands
Rodriguez, George,Bazan, Guillermo C.
, p. 343 - 352 (2007/10/03)
General synthetic routes to zirconium metallocene-like complexes containing derivatives of the dianionic trimethylenemethane (TMM) ligand are presented. One approach consists of reacting the dilithium salts of TMM, tribenzylidenemethane (TBM), tert-butylt
Azonia-azulene Salts. Part 5. Synthesis of 5H-Pyrroloazepine and of 7H-Pyrroloazepin-7-one
Jones, Gurnos,Radley, Peter M.
, p. 1123 - 1130 (2007/10/02)
The synthesis of (Z)- and (E)-1-azido-1,4-diphenylbut-1-ene (6a and b) is described, and their thermal decomposition.The synthesis of 5H-pyrroloazepine (2) and of 7H-pyrroloazepin-7-one (3) via the common dihydroazepinone intermediate (11) i
Conformations and Rotational Barriers of 1,3-Diphenylallyllithium Compounds
Boche, Gernot,Buckl, Klaus,Martens, Diether,Schneider, Dieter R.
, p. 1135 - 1171 (2007/10/02)
The phenyl substituents of the 1,3-diphenylallyl anions 10 (gegenion lithium, solvent tetrahydrofuran) can exist in the exo,exo-, endo,exo- and/or endo,endo-conformations.We have investigated the influence of substituents R at C2 on the equilibria of these solvent separated ion pairs.While 10a (R = H) is the only one to exist predominantly in the exo,exo-conformation, and in 10b and c (R = CH3 and CN, respectively) the endo,exo-conformers predominate, in 10d, e and f (R = C2H5, C6H5 and iPr, respectively) there is increasing preference for the endo,endo-conformation, which in 10g (R = tBu) is the dominant (>/= 95percent) conformation.A vast congestion in the endo,endo-conformation is avoided by a rotation of the phenyl rings out of the plane of the allyl carbon atoms, and an expansion of the sp2 angles in the allyl moiety.The rotational barriers around the allyl anion bonds decrease from 19.1 kcal*mol-1 (10a) to 12.5 kcal*mol-1 (10f).Since this trend parallels to the above mentioned shift of the equilibria, it is due to ground state effects.The rotational barriers are only slightly (10a,b) if at all influenced by gegenion effects, which is in sharp contrast to the parent allyl "anion".Therefore, the rotational barriers of the allyl anions 10 are qualified for a comparison with the corresponding radicals and cations.Furthermore, with ΔG(excit)273 deg C = 19.1 kcal*mol-1 as a lower limit value for the rotational barrier of the parent allyl anion, one can estimate that the true value of this species must be close to barriers calculated with STO-3G and 4-3l-G programs (ca. 26 kcal*mol-1).
