13938-22-2Relevant academic research and scientific papers
Acid-catalyzed synthesis of α,β-disubstituted conjugated enones by a Meyer-Schuster-type rearrangement in allenols
Alcaide, Benito,Almendros, Pedro,Cembellín, Sara,Martínez Del Campo, Teresa
, p. 1070 - 1078 (2015/03/30)
A novel, direct and simple methodology to gain access to α,β-disubstituted conjugated enones from α-allenols in a sustainable metal catalysis context, considering the inexpensiveness and environmentally friendliness of iron(III) species and protons, has b
Synthesis and antimicrobial evaluation of some pyrazole derivatives
Sharshira, Essam Mohamed,Hamada, Nagwa Mohamed Mahrous
scheme or table, p. 4962 - 4971 (2012/09/22)
Reaction of a series of (E)-3-phenyl-4-(p-substituted phenyl)-3-buten-2- ones with p-sulfamylphenyl hydrazine in glacial acetic acid gave the corresponding hydrazones, subsequent treatment of which with 30% HCl afforded pyrazole-1-sulphonamides. On the ot
Iridium-catalyzed asymmetric hydrogenation of α-substituted α,β-unsaturated acyclic ketones: Enantioselective total synthesis of (-)-mesembrine
Zhang, Qian-Qian,Xie, Jian-Hua,Yang, Xiao-Hui,Xie, Jian-Bo,Zhou, Qi-Lin
supporting information, p. 6158 - 6161 (2013/02/23)
A highly efficient asymmetric hydrogenation of α-substituted α,β-unsaturated acyclic ketones catalyzed by chiral spiro iridium complexes for the preparation of chiral 2-substituted allylic alcohols has been developed (ee up to 99.7%). This method provides a concise route to (-)-mesembrine (34% yield, 12 steps).
Regio- and stereochemical aspects of the palladium-catalyzed desilylation-arylation of substituted vinylsilanes
Alvisi, Davide,Blart, Errol,Bonini, Bianca Flavia,Mazzanti, Germana,Ricci, Alfredo,Zani, Paolo
, p. 7139 - 7146 (2007/10/03)
The palladium-catalyzed desilylation-arylation of substituted vinylsilanes by p-iodoanisole in the presence of bidentate phosphine ligands is described. Apart from enhancing the rate of the reaction considerably, heteroatom-based functional groups in the vinylsilane moiety have a profound influence on the regiochemistry. A catalytic cycle for the chelation-controlled desilylation-arylation reaction involving five- and six-membered chelate rings is proposed.
Singlet Photochemistry of Vinylcyclopropenes. Regioselectivity and Mechanism: Mechanistic and Exploratory Organic Photochemistry
Zimmerman, Howard E.,Wilson, David W.
, p. 692 - 697 (2007/10/02)
A study of the direct photochemistry of 1-anisyl-2-phenyl-3-methyl-3-isobutenylcyclopropene (5) was pursued with the objective of elucidating the reaction regioselectivity and casting light on alternative reaction mechanisms for this reaction known to aff
