A5038926066- Fluorine in Organic Chemistry
- Paleontology and Stratigraphy of Fossils
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Geological and Geophysical Studies
- Geology and Paleoclimatology Research
- Cephalopods and Marine Biology
- Catalytic C–H Functionalization Methods
- Synthesis and Reactions of Organic Compounds
- Asymmetric Synthesis and Catalysis
- Marine Biology and Ecology Research
- Hydrocarbon exploration and reservoir analysis
- Geological and Geochemical Analysis
- Geochemistry and Elemental Analysis
- Isotope Analysis in Ecology
- Cyclopropane Reaction Mechanisms
- Chemical Synthesis and Analysis
- Genetic diversity and population structure
- Inorganic Fluorides and Related Compounds
- Species Distribution and Climate Change
- Synthesis and Catalytic Reactions
- Synthetic Organic Chemistry Methods
- Synthesis and Biological Evaluation
- Organophosphorus compounds synthesis
- Carbohydrate Chemistry and Synthesis
Nanjing Institute of Geology and Paleontology
2015-2025
Chinese Academy of Sciences
2004-2025
Suzhou University of Science and Technology
2023
Shanghai Institute of Technology
2013-2022
East China University of Science and Technology
2009-2020
State Key Laboratory of Palaeobiology and Stratigraphy
2020
Shanghai Harbour Engineering Design & Research Institute
2020
University of Chinese Academy of Sciences
2015-2018
University of Toronto
2015-2016
Davenport University
2016
An organocatalytic asymmetric direct aldol addition reaction that involves cleavage of a carbon–carbon bond through the release trifluoroacetate was developed. The protocol is wide in scope, generating desired oxindoles biological interest nearly quantitative yields (up to 99 %) with excellent enantioselectivities 98 % ee) and diastereoselectivities 99:1 d.r.).
While the utility of vinylogous enolates is well established in setting aldol, Mannich, and Michael chemistries, literature reports concerning γ-reactivity are scarce for other reaction classes. Presented herein an unprecedented example reactivity exemplified by rhodium-catalyzed asymmetric ring-opening oxabicycles. This strategy also provides a powerful route to incorporate biologically useful coumarin motif into hydronapthalene scaffold.
A major and geologically sudden change occurred in the Darriwilian (mid–Ordovician) of three peri–Gondwana areas (Sibumasu Lhasa terranes Himalaya), from a warm–water Australian–North Chinese cephalopod–conodont fauna to cool–water, South China fauna. This shift is contemporaneous with P2 eruptive phase mantle plume generated Alborz Large Igneous Province Iran possibly rifting Gondwana. faunal was due hypothetical influx cool–water current along margin initiated by rifting.
A major and geologically sudden change occurred in the Darriwilian (mid-Ordovician) of three peri-Gondwana areas (Sibumasu, Lhasa terranes, Himalaya), from a warm-water Australian−North Chinese cephalopod-conodont fauna to cool-water, South fauna. This shift is contemporaneous with P2 eruptive phase mantle-plume−generated Alborz Large Igneous Province Iran possibly rifting China Gondwana. faunal was initiated by formation an incipient ocean hypothetical influx cool-water current along margin.
Despite the excellent fossil record of cephalopods, their early evolution is poorly understood. Different, partly incompatible phylogenetic hypotheses have been proposed in past, which reflected individual author's opinions on importance certain characters but were not based thorough cladistic analyses. At same time, methods inference undergone substantial improvements. For datasets, typically only include morphological data, Bayesian and particular introduction fossilized birth-death model...
Abstract A new organocatalytic asymmetric Michael addition reaction by cleavage of carbon‐carbon bonds through a mild release trifluoroacetate has been developed. The reported method generates the decarboxylated γ‐nitro‐α‐fluorocarbonyl products with excellent enantioselectivies (up to 98% ee ) and good diastereoselectivies 20:1 dr ).
Eine organokatalytische asymmetrische direkte Aldoladdition, die Spaltung einer C-C-Bindung durch Freisetzung von Trifluoracetat beinhaltet, wurde entwickelt. Die Methode hat eine große Substratbreite und liefert gewünschten Oxindole in beinahe quantitativen Ausbeuten (bis 99 %) mit ausgezeichneten Enantio- 98 % ee) Diastereoselektivitäten (d.r. bis 99:1).
Abstract While anthrones exist as privileged scaffolds in bioactive molecules, the enantioselective functionalization of is surprisingly scarce literature, with no asymmetric transition metal catalyzed example to date. Herein, we report first benzylic through rhodium(I) desymmetrization oxabicycles. As previously developed systems were found be unsuitable for this substrate, a new robust fourth‐generation [Rh(cod)OH] 2 based catalytic system was address synthetic challenges protocol.
A copper magnetite nanohybrid catalyst (Cu-Fe3O4/Cu/C), abundant of Schottky interfaces and structural defects, with ultrathin encapsulation graphitic carbon, was synthesized tested. The shows enhanced catalytic activity, far higher than the single mixed counterparts toward ultrasonic-assisted heterogeneous Fenton degradation rhodamine-B, exhibiting a reaction rate constant 0.146 min–1 much larger that over carbon-encapsulated Cu (Cu/C, 0.010 min–1) Fe3O4 (Fe3O4/C, 0.009 min–1). Besides,...
The Ordovician Lagerstätten record substantial amounts of excellent preservation and soft-bodied fossils during the Great Biodiversification Event (GOBE). However, few are known from Lower Ordovician, most which preserved in restricted environments high-latitude regions. Here, we report on a new tropical Lagerstätte, Liexi fauna, has been recently discovered carbonate succession within Madaoyu Formation western Hunan, South China. It contains variety soft tissues, as well rich shelly...