Results 101 to 110 of about 4,073,254 (239)

University teaching of mass spectrometry as a key practical technique within the context of a fully integrated, spiral curriculum

Rapid Communications in Mass Spectrometry, EarlyView.
Rationale Mass spectrometry (MS) is introduced to high school students in the UK in many pre‐university course syllabi. As such, we have identified the use of MS as a key technique that should be taught practically to undergraduates from the outset of their studies.
Andrew F. Worrall, Craig D. Campbell, Megan O. Midson, Malcolm I. Stewart   +3 more
wiley   +1 more source

Exploiting the cross-metathesis reaction in the synthesis of pseudo-oligosaccharides

, 2009
An approach to the synthesis of pseudo-oligosaccharides based on the cross-metathesis reaction between distinct sugar-olefins, followed by intramolecular cyclization of the obtained heterodimer, is presented. In particular, the relative efficiency of two
S. Guglieri, L. Polito, P. Ronchi, VIGNANDO, STEFANO, L. Lay   +4 more
core   +1 more source

Morphological Stabilization of CsPbBr3 Quantum Dot Films Enabled by PVC‐g‐PMMA Graft Copolymer Encapsulation for Water‐Robust Color Conversion

Small, EarlyView.
Poly(vinyl chloride)‐graft‐poly(methyl methacrylate) encapsulation enabled formation of water‐stable CsPbBr3‐quantum‐dot fims with enhanced photoluminescence (PL) retention upon exposure to water, UV radiation, and ethanol. Time‐dependent ex situ transmission electron microscopy with quantitative particle segmentation identified the coefficient of ...
Seung Ryeol Song, Kyungwon Seo, Uoon Chul Baek, Min‐Gon Shin, Chanwung Mun, Hyosung An, Jung Tae Park   +6 more
wiley   +1 more source

Stereo selective synthesis of C3–C12 fragment of iriomoteolide-1a

Journal of Saudi Chemical Society, 2018
A convergent and flexible synthetic route for the synthesis of C3–C12 fragment of iriomoteolide-1a is described. The key steps are: Mannich reaction, Keck asymmetric allylation, Sharpless asymmetric epoxidation and cross-metathesis protocol.
Gangavaram V.M. Sharma, Karnekanti Rajender   +1 more
doaj   +1 more source

Z-Trisubstituted α,β-Unsaturated Esters and Acid Fluorides through Stereocontrolled Catalytic Cross-Metathesis. [PDF]

J Am Chem Soc, 2023
Qin C, Koengeter T, Zhao F, Mu Y, Liu F, Houk KN, Hoveyda AH.   +6 more
europepmc   +1 more source

Recent advances in polymeric chemically amplified positive resists: Materials and design strategies

Smart Molecules, EarlyView.
This review summarizes recent advances in the molecular design of positive chemically amplified resists, focusing on photoacid generators and polymer architectures. Key strategies for enhancing sensitivity—including self‐amplification effects, copolymerization of sensitive monomers, controlled polymerization, and photosensitized chemically amplified ...
Litao Zhou, Haoyuan Li, Jianhua Zhang, Hanshen Xin   +3 more
wiley   +1 more source

Synergism between hierarchical MFI zeolites and alumina in alkene cross-metathesis reactions as a function of composition. [PDF]

RSC Adv, 2023
Wei N, Zhang W, Zhang D, Huang S.
europepmc   +1 more source

Sulfur‐ and Selenium‐Decorated Coumarins: Synthetic Strategies Involving Cyclization and Late‐Stage Functionalization

The Chemical Record, EarlyView.
Two decades of synthetic strategies for sulfur‐, selenium‐decorated coumarins are critically surveyed through 44 literature reports, with particular emphasis on derivatives functionalized at the C‐3 and C‐4 positions. This review reports the direct construction of the coumarin framework through cyclization processes and late‐stage functionalization of ...
Bruna R. Schneider, Laura D. de Avila, Mauricio C. D. F. Xavier, Alex F. C. Flores, Liane K. Soares, Gabriel P. da Costa, Angelita M. Barcellos   +6 more
wiley   +1 more source

Practical and stereoselective synthesis of alkenes through catalytic cross-metathesis [PDF]

, 2018
Thesis advisor: Amir H. HoveydaAbstract Chapter 1: Development of Efficient and Kinetically E-Selective Cross-Metathesis to Generate Alkenyl Halides We have devised a broadly applicable strategy to achieve kinetically E-selective cross-metathesis to ...
Nguyen, Thach Truc
core  

Bidirectional cross metathesis and ring-closing metathesis/ring opening of a C2-symmetric building block: a strategy for the synthesis of decanolide natural products

Beilstein Journal of Organic Chemistry, 2013
Starting from the conveniently available ex-chiral pool building block (R,R)-hexa-1,5-diene-3,4-diol, the ten-membered ring lactones stagonolide E and curvulide A were synthesized using a bidirectional olefin-metathesis functionalization of the terminal ...
Bernd Schmidt, Oliver Kunz
doaj   +1 more source