Results 61 to 70 of about 6,084 (222)
European Journal of Organic Chemistry, EarlyView.This work introduces an efficient and gram‐scale microwave‐assisted (3+2) cycloaddition of nitrones with fluorinated allenylphosphonates, yielding diverse 4‐phosphinyl‐pyrrolidin‐3‐ones with exclusive 4,5‐trans diastereoselectivity in moderate to good yields.
Rayhane Hammami +6 more
wiley +1 more source
Metal-Bound or Free Ylides as Reaction Intermediates in Metal-Catalyzed [2,3]-Sigmatropic Rearrangements? It Depends. [PDF]
, 2020 Croix J. Laconsay, Dean J. Tantillo
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Effect of Ring Size and Migratory Groups on [1,n] Suprafacial Shift Reactions. Confirmation of Aromatic and Antiaromatic Transition-State Character by Ring-Current Analysis [PDF]
, 2016 Suprafacial sigmatropic shift reactions of 5-substituted cyclopentadienes, 3-substituted cyclopropenes, and 7-substituted cycloheptatrienes have been studied computationally at the MP2/6-31+G* level for structures and energetics, and using the ...
Clarke, J. +3 more
core +1 more source
The Chemical Record, EarlyView.In February through April 1965, Hoffmann devised several MO tools to explain the regiochemistry of the Diels‐Alder and the preference of the Cope reaction to proceed by the chair rather than boat orientations, when both were possible. The secret lay in secondary orbital interactions that were revealed through qualitative perturbation theory.
Jeffrey I. Seeman
wiley +1 more source
ChemistryEurope, Volume 3, Issue 4, July 14, 2025.The reaction of dipotassium germoldiides with donor complexes of AlCl3 reveals an astonishing broad line‐up of products. Key products are Ge(II)alumole complexes, cationic germole complexes of aluminylenes, and a 2H‐germole derivative. Product formation is influenced by the choice of the donor, its size and its stoichiometric ratio.
Lena Albers +2 more
wiley +1 more source
Synthesis of Fully Substituted Pyrimidines [PDF]
, 2016 A novel approach to the synthesis of fully substituted pyrimidine derivatives armed with an oxy-functionalized acetate chain at the ring is described. The manifold uses amidines as the nitrogen source and activated skipped diynes as the electrophilic
García-Tellado, Fernando +2 more
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Chemistry – A European Journal, Volume 31, Issue 39, July 11, 2025.N‐heteroaromatic alkyl alcohols and amines are inherently unstable in acidic and/or basic solution due to an irreversible dehydrogenation that proceeds from a minority tautomer. In many cases, this reaction results in quantitative oxidation to the corresponding aldehyde, providing a simple, convenient, and green approach for preparing versatile ...
Omid Ghasemloo +4 more
wiley +1 more source
Journal of the Brazilian Chemical Society, 1999 The Rh2(OAc)4 catalyzed intramolecular O-H insertion reaction of delta-hydroxy-alpha-diazoesters affords 3(2H)-furanone-2-carboxylates in good yield but with moderate selectivity (d.e. ca 60%).
Padwa Albert, Sá Marcus Mandolesi
doaj
An unexpected Ireland–Claisen rearrangement cascade during the synthesis of the tricyclic core of Curcusone C: Mechanistic elucidation by trial-and-error and automatic artificial force-induced reaction (AFIR) computations [PDF]
, 2019 In the course of a total synthesis effort directed toward the natural product curcusone C, the Stoltz group discovered an unexpected thermal rearrangement of a divinylcyclopropane to the product of a formal Cope/1,3-sigmatropic shift sequence.
Houk, K. N. +6 more
core +5 more sources
Angewandte Chemie International Edition, Volume 64, Issue 25, June 17, 2025.Using ammonia in combination with hypochlorites as simple oxidants under phase‐transfer conditions allows for the direct oxidative α‐amination of reactive enolate precursors such as cyclic β‐ketoesters, oxindoles, as well as malonitriles and malonates with good to excellent yields.
Christopher Mairhofer +6 more
wiley +1 more source