Results 71 to 80 of about 2,987 (182)

Construction of Spirooxindole Skeleton Through Intramolecular Dieckmann Cyclization

open access: yesNatural Products and Bioprospecting, 2017
A highly efficient and direct approach was developed to construct the structurally diverse spirooxindole skeleton, which is an important basic motif in natural products.
Ting Wu, Zhiqiang Pan, Chengfeng Xia
doaj   +1 more source

Development of the HTRF assay to evaluate the auxin‐induced binding between TIR1 and IAA7

open access: yesNew Phytologist, Volume 250, Issue 5, Page 3475-3485, June 2026.
Summary Auxin plays diverse roles in plant growth and development, including sensing environmental changes. Quantifying the interaction between auxin coreceptors provides the molecular basis for cells to sense and adapt to environmental cues. Although several assays are available, a more high‐throughput method is necessary to efficiently evaluate the ...
Jekson Robertlee, Shinya Hagihara
wiley   +1 more source

Diastereo- and enantioselective [3 + 3] cycloaddition of spirocyclopropyl oxindoles using both aldonitrones and ketonitrones

open access: yesNature Communications, 2017
Chiral spirocyclic compounds are important structural motifs for drug discovery. Here, the authors report a synthetic route to spirocycles based on enantioselective cycloaddition of activated spirocyclopropyl oxindoles, which act as donor-acceptor ...
Peng-Wei Xu   +6 more
doaj   +1 more source

Bifunctional Photocatalysts: Exploiting Proximity for Enhanced Reaction Performance

open access: yesChemistry – A European Journal, Volume 32, Issue 19, 22 May 2026.
This review covers the application of the bifunctional approach to photocatalysis as a means to attain (enhanced) enantioselectivity, and, more in general, as a strategy to enhance the catalytic performance through an effective use of short‐lived reaction intermediates.
Luigi Dolcini   +3 more
wiley   +1 more source

Push–Pull Ynamines and Push–Pull Ynamides: Synthesis, Structure, Reactivity, and Application

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 19, 22 May 2026.
Push–pull ynamines and push–pull ynamides, which carry an EWG and an amino or amido group as EDG, are highly interesting classes of EDG‐EWG alkynes that have been intensively studied due to their exceptional reactivity. In this review, the synthesis, structure, reactivity, and application of push–pull ynamines, push–pull ynecarbamates, push–pull ...
Hans‐Joachim Gais
wiley   +1 more source

Organocatalytic asymmetric allylic amination of Morita–Baylis–Hillman carbonates of isatins

open access: yesBeilstein Journal of Organic Chemistry, 2012
The investigation of a Lewis base catalyzed asymmetric allylic amination of Morita–Baylis–Hillman carbonates derived from isatins afforded an electrophilic pathway to access multifunctional oxindoles bearing a C3-quaternary stereocenter, provided with ...
Hang Zhang   +4 more
doaj   +1 more source

Iodide/H2O2 Catalyzed Intramolecular Oxidative Amination for the Synthesis of 3,2′-Pyrrolidinyl Spirooxindoles

open access: yesMolecules, 2018
An ammonium iodide/hydrogen peroxide-mediated intramolecular oxidative amination of 3-aminoalkyl-2-oxindoles was achieved, affording the corresponding 3,2′-pyrrolidinyl spirooxindoles and their 6- or 7-membered analogous in moderate to high yields.
Yu-Ting Gao   +6 more
doaj   +1 more source

Complete transfer of chirality in an intramolecular, thermal [2 + 2] cycloaddition of allene-ynes to form non-racemic spirooxindoles

open access: yesBeilstein Journal of Organic Chemistry, 2011
A thermal [2 + 2] cycloaddition reaction of allene-ynes has been used to transform chiral non-racemic allenyl oxindoles into chiral non-racemic spirooxindoles containing an alkylidene cyclobutene moiety.
Kay M. Brummond, Joshua M. Osbourn
doaj   +1 more source

A Facile One-Pot Construction of Succinimide-Fused Spiro[Pyrrolidine-2,3′-Oxindoles] via 1,3-Dipolar Cycloaddition Involving 3-Amino Oxindoles and Maleimides

open access: yesMolecules, 2018
Increasing interests have been invested in the development of synthetic strategies toward the construction of spiro[pyrrolidine-2,3′-oxindole], which is the core structural skeleton in some compounds with diverse biological activities.
Lunqiang Jin, Feng Liang
doaj   +1 more source

Palladium-Catalyzed One-Pot Approach to 3-(Diarylmethylene)oxindoles from Propiolamidoaryl Triflate

open access: yesMolecules, 2015
3-(Diarylmethylene)oxindoles have been synthesized from propiolamidoaryl triflate utilizing a palladium-catalyzed one-pot reaction consisting of three successive reactions: Sonogashira, Heck, and Suzuki-Miyaura. This method allows for the production of a
Dahye Lee   +4 more
doaj   +1 more source

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