A5055575099- Asymmetric Hydrogenation and Catalysis
- Organophosphorus compounds synthesis
- Peanut Plant Research Studies
- Chemical Synthesis and Analysis
- Asymmetric Synthesis and Catalysis
- Cyclopropane Reaction Mechanisms
- Axial and Atropisomeric Chirality Synthesis
- Catalytic C–H Functionalization Methods
- Fluorine in Organic Chemistry
- Catalytic Alkyne Reactions
- Catalytic Processes in Materials Science
- Catalysis for Biomass Conversion
- Chemical Synthesis and Reactions
- Catalysts for Methane Reforming
- Phosphorus compounds and reactions
- Synthesis of Indole Derivatives
- Synthesis and Catalytic Reactions
- Radical Photochemical Reactions
- Ecology and Conservation Studies
- Pasture and Agricultural Systems
- Inorganic Fluorides and Related Compounds
- Plant Physiology and Cultivation Studies
- Nitrogen and Sulfur Effects on Brassica
- Ruminant Nutrition and Digestive Physiology
- Sulfur-Based Synthesis Techniques
Zhengzhou University
2020-2022
Shenyang Agricultural University
2021
Shanghai Institute of Organic Chemistry
2017-2019
University of Chinese Academy of Sciences
2019
China Pharmaceutical University
2017
Liaocheng University
2014-2016
Molina Center for Energy and the Environment
2015
National Institute of Advanced Industrial Science and Technology
2015
Washington State University
2014
Shanghai University of Engineering Science
2013
Abstract Background The peanut is one of the most important oil crops worldwide. Qualities and yields can be dramatically diminished by abiotic stresses particularly drought. Therefore, it would beneficial to gain a comprehensive understanding on drought-responsive transcriptional regulatory activities, hopefully extract critical drought-tolerance-related molecular mechanism from it. Results In this study, two Arachis hypogaea L. varieties, NH5 (tolerant) FH18 (sensitive), which show...
Despite extensive studies on hydrogen production via steam reforming of alcohols and sugar alcohols, catalysts typically suffer a variety issues from poor selectivity to rapid deactivation. Here, we summarize recent advances in fundamental understanding functionality structure for alcohol/sugar alcohol reforming, provide perspectives further development required design highly efficient catalysts.
Abstract A palladium‐catalyzed oxa‐[4+2] annulation of para ‐quinone methides with allyl carbonates bearing a nucleophilic alcohol side chain has been developed. This method provided an efficient strategy to the construction 2‐oxaspiro‐cyclohexadienones via 1,6‐conjugated addition‐mediated allylation in moderate good yields. Preliminary results on asymmetric derivatives promised potential synthesis enantioenriched frameworks. magnified image
The earth-abundant cobalt-catalyzed anti-Markovnikov hydroalkylation of unactivated alkenes with oxime esters was achieved by introducing an 8-aminoquinoline directing group on the alkenes. catalytic system, consisting commercially available Co(acac)3 and PhMeSiH2, enables construction unfunctionalized C(sp3)-C(sp3) bonds features exclusive selectivity, good functional tolerance, avoidance extra ligand, oxidant, or base. Mechanistic insight into this new system indicates involvement both...
Optically pure reagents that are able to deliver a trifluoromethylthio group with good excellent enantioselectivities.
Herein we develop a new "cobalt(II)/organic oxidant" catalytic system for the selective activation of 1°, 2°, and 3° C(sp3)–H bonds to construct C–N C–O bonds, respectively. The method highlights use an organic compound (TsNHOPiv or its analogues) as emerging oxidant thus provides flexible strategy preparation indoline benzoxazine derivatives. Attractive advantages this cobalt catalysis include simple operation, low cost, mild conditions, broad substrate scope. Furthermore, catalytically...
By using a benzimidazole core and N-substitutions to tune the electronic properties of corresponding N-heterocyclic carbenes, one-pot protocol for efficient synthesis α-aminoboronic esters without need glovebox was developed in this work. The starting materials transformation can also be extended from aldehydes ketones. An alternative with short reaction time preformed carbene-copper chloride is described.
Summary of main observation and conclusion The invention a family optically pure electrophilic difluoromethylthiolating reagents 9a – c based on the camphorsultam skeleton was described. These reacted with variety soft carbon nucleophiles such as oxazolone, oxindole, benzolactone β‐ketoester in good to excellent enantioselectivities.
P,C-Stereogenic 1,3-bisphosphinylpropanes 3 that have up to five stereogenic centers could be obtained stereoselectively in high yields by a one-step reaction of (RP)-menthylphenylphosphine oxide 1 with α,β-unsaturated aldehydes 2 catalyzed KOH at room temperature. A mechanism was proposed as involve stereoselective intermolecular 1,3′-phosphorus migration from the 1,2-adduct another generating 1,4-adduct subsequently reacts produce 3.
Abstract P,C‐Stereogenic α‐hydroxyl phosphinates or phosphine oxides were prepared from the additions of ( R P )‐phosphinate to ketones )‐phosphine oxide aldehydes, respectively, catalyzed by bases at room temperature in up >99:1 diasteromeric ratio (d.r. /d.r. C ) and 99 % yields. The diastereoselectivity was induced reversible equilibrium different stabilities between two diastereomers adduct, which caused spatial interaction menthoxyl menthyl alkyl groups aldehydes ketones.
A stability-controlled diastereoselective addition of a chiral P–H species to ketones afforded <italic>P</italic>,<italic>C</italic>-stereogenic α-hydroxyphosphinates in excellent yields and dr.
P,C-Stereogenic α-amino phosphine oxides were prepared from the addition of (RP )-menthyl phenyl oxide to chiral aldimines under neat condition at 80 °C in up 91:9 drC and 99% yields. The diastereoselectivity was mainly induced by phosphorus that showed matched or mismatched induction with (S)- (R)-aldimines, respectively.
Abstract This trial was conducted to assess the suitability of one local and eight introduced lucerne (Medicago sativa) cultivars seasonally dry conditions in semi‐arid region west China. The foliage yield, root biomass, decline plant density proline accumulation leaf were significantly different between nine after two seasons. ‘Ameristand201 ‘Algonquin’ performed well based on yield. Root biomass ‘Ameristand201’ ‘Sandili’ greater than that other seven cultivars. best cultivar drought...
The novel allenylphosphinates containing up to three axial and phosphorus asymmetric centers were prepared in excellent yields via the reactions of 6‐chloro‐6 H ‐dibenzo[ c , e ][1,2]oxaphosphinine propargyl alcohols. During process, configuration determined biphenyl chirality, stereospecifically forming ( l )‐stereomers but did not influence chirality allenyl axis.
Abstract Review: 128 refs.
Abstract P,C‐stereogenic α‐hydroxyl phosphinates or phosphine oxides are synthesized in stability‐controlled diastereoselective reactions catalyzed by bases up to <99:1 diastereomeric ratio.
Abstract P,C‐Stereogenic 1,3‐bisphosphinylpropanes [(III) and (V)] are stereoselectively synthesized from (R p )‐methylphenylphosphine oxide (II) unsaturated aldehydes [(I) (IV)] following a 1,2‐addition/1,3′‐phosphorus migration sequence.