Results 41 to 50 of about 6,084 (222)
Toward a Symphony of Reactivity: Cascades Involving Catalysis and Sigmatropic Rearrangements [PDF]
, 2014 Catalysis and synthesis are intimately linked in modern organic chemistry. The synthesis of complex molecules is an ever evolving area of science. In many regards, the inherent beauty associated with a synthetic sequence can be linked to a certain ...
Jones, Amanda C. +3 more
core +1 more source
From conjugated tertiary skipped diynes to chain-functionalized tetrasubstituted pyrroles [PDF]
, 2016 A novel and metal-free method for the synthesis of chain-functionalized tetrasubstituted pyrroles from easily accessible tertiary skipped diynes, was reported.
García-Tellado, Fernando +3 more
core +1 more source
Asian Journal of Organic Chemistry, EarlyView.Ir‐catalyzed sulfur‐directed C─H alkenylation of alkynoates proceeded by using aryl methallyl sulfides. When DMAD was employed, 1,3‐dienes were initially formed and subsequently underwent thermal 1,5‐sigmatropic rearrangement to yield secondary products with high stereoselectivitiy.
Takanori Shibata, Haru Marumo
wiley +1 more source
Beilstein Journal of Organic Chemistry, 2017 It has been proposed that elemanes are biogenetically formed from germacranes by Cope sigmatropic rearrangements. Normally, this reaction proceeds through a transition state with a chair conformation.
José Enrique Barquera-Lozada +1 more
doaj +1 more source
ChemInform Abstract: THE COMPETITION BETWEEN ELECTROCYCLIC REACTION AND (1,5)SIGMATROPIC REACTION IN THE THERMOLYSIS OF 1,1‐DISUBSTITUTED BENZOCYCLOBUTENES [PDF]
Chemischer Informationsdienst, 1984 AbstractDie Thermolyse einer Reihe von Benzocyclobutenen wird untersucht.
Tetsuji Kametani +4 more
openaire +3 more sources
New chemistry of diazafulvenium methides: one way to pyrazoles [PDF]
, 2006 Diazafulvenium methides generated from the solution pyrolysis of pyrazolo[1,5-c][1,3]thiazole-2,2-dioxides participate in [8[pi]+2[pi]] cycloadditions giving pyrazolo[1,5-a]pyridine derivatives.
Gonsalves, António M. d'A. Rocha +2 more
core +1 more source
Asymmetric Synthesis of Propargylic and Allenic Silanes, Germanes, and Stannanes
Chemistry – An Asian Journal, EarlyView.Organotetrel compounds are important reagents with broad applications in chemical industries and natural product synthesis. This review provides a summary of strategies for the synthesis of propargylic and allenic organotetrels in their enantioenriched forms.
Hai Chang, Ruihan Wang, Yi‐Ming Wang
wiley +1 more source
Group I tert‐Amylates: A Comparative Study in Hydrophosphination Reactions
ChemCatChem, EarlyView.A comparative study of group I tert‐amylate precatalysts for hydrophosphination demonstrates increasing reactivity down the group to the first examples of rubidium and cesium in this reaction. Catalytic activity with lighter and more abundant elements, typified by potassium, can be enhanced with a crown ether, demonstrating the importance of ion ...
Diego R. Javier‐Jiménez +4 more
wiley +1 more source
The role of tachysterol in vitamin D photosynthesis - A non-adiabatic molecular dynamics study
, 2017 To investigate the role of tachysterol in the photophysical/chemical regulation of vitamin D photosynthesis, we studied its electronic absorption properties and excited state dynamics using time-dependent density functional theory (TDDFT), coupled ...
Baluyot, Noel +4 more
core +1 more source
Development of an Efficient Stereoretentive Para‐Claisen‐Cope Rearrangement
ChemistryEurope, EarlyView.The stereoretentive para‐Claisen‐Cope rearrangement enabled by Europium catalysis is presented, achieving precise phenol functionalization with exceptional chirality transfer under air‐ and moisture‐tolerant conditions. A novel carbonate unlocks superior enantioselectivity in the Tsuji‐Trost allylic alkylation, paving the way for highly enantioenriched
Johanna Breinsperger +3 more
wiley +1 more source