Results 41 to 50 of about 10,332 (223)
Angewandte Chemie, Volume 138, Issue 32, 3 August 2026.Cyclopentadienes (CpHs) are fundamental building blocks with widespread applications in chemistry. However, their inherent acidity and isomeric instability have long limited access to chiral variants in an asymmetric fashion. Here, we introduce a CuH‐catalyzed asymmetric transformation that provides an unprecedented entry into a new class of ...
Piero Soppelsa +4 more
wiley +2 more sources
Gold-Catalyzed Allylation Reactions [PDF]
, 2016 The allylation reaction is a well-established and indispensable tool for the development of chemical complexity and diversity in organic synthesis. Over several decades, this unique transfor- mation has undergone several developments to establish a more ...
QUINTAVALLA, ARIANNA, BANDINI, MARCO
core +1 more source
Boron-Catalyzed, Diastereo- and Enantioselective Allylation of Ketones with Allenes [PDF]
, 2022 The diastereo- and enantioselective allylation of ketones remains a synthetic challenge, with transition metal catalysis offering the most applied methods. Here, a boron-catalyzed allylation of ketones with allenes is presented.
Willcox, Dominic R.; id_orcid +16 more
core +1 more source
Re2O7-catalyzed reaction of hemiacetals and aldehydes with O-, S-, and C-nucleophiles
Beilstein Journal of Organic Chemistry, 2013 Re(VII) oxides catalyze the acetalization, monoperoxyacetalization, monothioacetalization and allylation of hemiacetals. The reactions, which take place under mild conditions and at low catalyst loadings, can be conducted using hemiacetals, the ...
Wantanee Sittiwong +4 more
doaj +1 more source
Palladium-Catalyzed Allylation/Benzylation of H-Phosphinate Esters with Alcohols
Molecules, 2016 The Pd-catalyzed direct alkylation of H-phosphinic acids and hypophosphorous acid with allylic/benzylic alcohols has been described previously. Here, the extension of this methodology to H-phosphinate esters is presented. The new reaction appears general,
Anthony Fers-Lidou +2 more
doaj +1 more source
Energetics of the Allyl Group [PDF]
The Journal of Organic Chemistry, 2007 Aiming to improve our understanding of the stability of radicals containing the allylic moiety, carbon-hydrogen bond dissociation enthalpies (BDEs) in propene, isobutene, 1-butene, (E)-2-butene, 3-metylbut-1-ene, (E)-2-pentene, (E)-1,3-pentadiene, 1,4-pentadiene, cyclohexene, 1,3-cyclohexadiene, and 1,4-cyclohexadiene have been determined by quantum ...
Filipe, Agapito +4 more
openaire +2 more sources
Chiral Phosphoric Acid Catalyzed Enantioselective Allylation of Aldehydes with Allyltrichlorosilane [PDF]
, 2011 Easily accessible chiral phosphoric acid 1b has been applied as efficient organocatalyst for the asymmetric allylation of aldehydes with allyltrichlorosilane.
Fan Tiantian +3 more
core
Highly Diastereo- and Enantioselective Allylboration of Aldehydes using alpha-Substituted Allyl/Crotyl Pinacol Boronic Esters via in Situ Generated Borinic Esters [PDF]
, 2013 Readily available, alpha-substituted allyl/crotyl pinacol boronic esters often give low E/Z selectivity (with Z favored) in reactions with aldehydes. We found that addition of nBuLi to the pinacol boronic ester followed by trapping of the alkoxide with ...
Jack L.‐Y. Chen +10 more
core +1 more source
Beilstein Journal of Organic Chemistry, 2015 Various intricate propellane derivatives and oxa-bowls have been synthesized via a ring-rearrangement metathesis (RRM) as a key step starting from readily accessible starting materials such as p-benzoquinone, 1,4-naphthoquinone and 1,4-anthraquinone.
Sambasivarao Kotha, Rama Gunta
doaj +1 more source
Chiral Diol-Based Organocatalysts in Enantioselective Reactions
Molecules, 2018 Organocatalysis has emerged as a powerful synthetic tool in organic chemistry in the last few decades. Among various classes of organocatalysis, chiral diol-based scaffolds, such as BINOLs, VANOLs, and tartaric acid derivatives, have been widely used to ...
Truong N. Nguyen +3 more
doaj +1 more source