Journal ArticleDOI
Syntheses of chromenes and chromanes via o-quinone methide intermediates
Sabrina Baptista Ferreira,Fernando de C. da Silva,Fernando de C. da Silva,Angelo C. Pinto,Daniel T. G. Gonzaga,Vitor F. Ferreira +5 more
Reads0
Chats0
TLDR
This review intends to explore synthetic methodologies for the preparation of 2H-chromenes and their analog chromanes through ortho-quinone methide (o-QM) intermediates associated with inter and intramolecular hetero-Diels-Alder and electrocyclization reactions.About:
This article is published in Journal of Heterocyclic Chemistry.The article was published on 2009-11-01. It has received 116 citations till now.read more
Citations
More filters
Journal ArticleDOI
ortho‐Quinone Methides in Natural Product Synthesis
TL;DR: This review encompasses the major contributions inortho-Quinone methides, exemplifying the major strategies and reactivity modes which can be applied.
Journal ArticleDOI
Applications of ortho-Quinone Methide Intermediates in Catalysis and Asymmetric Synthesis
TL;DR: Current advances concerning the synthesis and utility of ortho-quinone methides are discussed with a particular emphasis on metal-catalyzed formation of quinone methide intermediates and applications of these intermediates as partners in asymmetric synthesis will be discussed.
Journal ArticleDOI
Asymmetric catalytic 1,6-conjugate addition/aromatization of para-quinone methides: enantioselective introduction of functionalized diarylmethine stereogenic centers.
Wen-Dao Chu,Le-Fen Zhang,Xu Bao,Xian-He Zhao,Chao Zeng,Ji-Yuan Du,Guo-Biao Zhang,Fang-Xin Wang,Xiao-Yan Ma,Chun-An Fan,Chun-An Fan +10 more
Journal ArticleDOI
Recent advances in the application of Diels-Alder reactions involving o-quinodimethanes, aza-o-quinone methides and o-quinone methides in natural product total synthesis.
Baochao Yang,Shuanhu Gao +1 more
TL;DR: This review summarizes recent advances in Diels-Alder reactions involving in situ-generated o-QDMs, o- QMs and aza-o-QMs, highlighting the power and potential of this strategy in organic synthesis and natural product total synthesis.
Journal ArticleDOI
Enantio- and diastereoselective access to distant stereocenters embedded within tetrahydroxanthenes: utilizing ortho-quinone methides as reactive intermediates in asymmetric Brønsted acid catalysis.
TL;DR: A chiral binol-based N-triflyphosphoramide was found to promote the in’situ generation of ortho-quinone methides and their subsequent reaction with 1,3-cyclohexanedione to provide the desired products with excellent enantioselectivities.
References
More filters
Journal ArticleDOI
Oxygen toxicity: a radical explanation.
TL;DR: During its reduction to water, O2 readily gives rise to dangerously reactive intermediates, but this threat is diminished by families of defensive enzymes which include the superoxide dismutases, catalases and peroxidases.
Journal ArticleDOI
Quinone chemistry and toxicity
Journal ArticleDOI
Discovery of insect anti-juvenile hormones in plants.?2U
TL;DR: To the knowledge, this is the first discovery of anti-JH, and it is hoped it will guide the way to the emergence of a fourth generation of safe and insect-specific pesticides.
Journal ArticleDOI
Transition Structures of Hydrocarbon Pericyclic Reactions
TL;DR: In this article, a detailed analysis of the geometries, energies, and electronic characteristics of the transition structures of pericyclic reactions is provided. But the analysis is restricted to a single class of reactions.