Results 121 to 130 of about 17,709 (313)

Iridium‐Catalyzed Linear‐Selective sp3 C−H Alkylation of N‐Methylamides Using Alkenes Enabled by Diphosphite Ligands

Chemistry – A European Journal, EarlyView.
An iridium‐catalyzed linear‐selective sp3 C─H alkylation of N‐methylamides with alkenes is described. This method tolerates various N‐methylacetamide derivatives and has a broad alkene scope. Mechanistic studies were also conducted. Internal alkenes can also be used through in situ consecutive alkene isomerization.
Haluhi Takahashi, Takanori Shibata
wiley   +1 more source

Low-Complexity Oversampled OTFS Receivers With Reduced Overhead

IEEE Open Journal of the Communications Society
Orthogonal Time Frequency Space (OTFS) modulation enables reliable communication in fast time-varying, frequency-selective channels. It is a delay-Doppler (DD) domain modulation that models the information symbols and the channel in the DD domain.
Narendra Deconda, Srikrishna Bhashyam, Nambi Seshadri, R. David Koilpillai   +3 more
doaj   +1 more source

Synthesis and Reactivity of Extremely Electron‐Poor Au(III) Complexes Bearing OTf− or NTf2− Ligands

Chemistry – A European Journal, EarlyView.
A new family of electron‐poor Au(III) cations bearing bistriflimide or triflate ligands is reported. These cations can undergo direct C─H metalation with simple arenes to give mono‐aryl cations. Subsequent addition of simple halide sources allows for reductive elimination of aryl halides, formally from Ar─H and X−. ABSTRACT The synthesis and structural
Lachlan Barwise, Emily Mulhallen‐Graham, Lachlan J. Moon, Lachlan Sharp‐Bucknall, Miracle I. Ekavhiare, Keith F. White, Jason L. Dutton   +6 more
wiley   +1 more source

Peak-to-Average Power Ratio Reduction of OTFS Based on Precoding DFT-Spread

IEEE Access
Orthogonal time frequency space (OTFS) modulation can effectively combat the multipath and Doppler effects in doubly-selective channels, making it suitable for high-speed mobility scenarios.
Haiqing Guan, Zongmiao He, Xinyuan Yang, Changjia Qu, Yarui Zuo   +4 more
doaj   +1 more source

A General Strategy for the Synthesis of Jerangolids Enabled by π‐allyl Stille Coupling

Chemistry – A European Journal, EarlyView.
A general strategy for the synthesis of jerangolids is established, featuring a late‐stage π‐allyl Stille coupling of two advanced, highly customizable building blocks to form the skipped diene core. The approach provides access to all naturally occurring jerangolids, including jerangolid H, whose configuration is confirmed by NMR analysis.
Janick Schug, Bernd Morgenstern, Johann Jauch   +2 more
wiley   +1 more source

Enhanced Hybrid Beamforming and Signal Detection of OTFS in Presence of Hardware Impairments

IEEE Open Journal of Vehicular Technology
Orthogonal time frequency space (OTFS) modulation is a promising approach to improve the performance of millimeter wave (mmWave) communication systems at high mobility while leveraging the wide available bandwidth.
Amit Singh, Sanjeev Sharma, Mohit Kumar Sharma, Kuntal Deka, Daniel Benevides da Costa   +4 more
doaj   +1 more source

Conservatism implications of shock test tailoring for multiple design environments [PDF]

A method for analyzing shock conservation in test specifications that have been tailored to qualify a structure for multiple design environments is discussed.
Baca, Thomas J., Bell, R. Glenn, Robbins, Susan A.   +2 more
core   +1 more source

Monosubstituted N‐Arylhydroxylamine Chemistry: Integrating Contemporary Synthetic Approaches for the Efficient Construction of Diverse Heterocyclic Scaffolds

Chemistry – A European Journal, EarlyView.
Monosubstituted N‐arylhydroxylamines represent a unique subclass of hydroxylamines that act as pivotal intermediates in redox transformations and as versatile platforms for further synthetic transformations. They serve as key building blocks in the synthesis of architecturally complex heterocycles and other valuable organic compounds.
Michael G. Kallitsakis, Kyriakos D. Nikopoulos, Ioannis N. Lykakis   +2 more
wiley   +1 more source

State‐of‐the‐Art and Synthetic Challenges for Hydrosilane Production

Chemistry – A European Journal, EarlyView.
The synthesis of hydrosilanes is currently energy intensive and their recycling is not considered. However, these compounds are important in many industrial fields but also for the valorization of oxygenated waste, towards a circular economy. This review compares the available synthetic routes and highlights the remaining challenges for the production ...
Gabriel Durin, Albane Fontaine, Jean‐Claude Berthet, Thibault Cantat   +3 more
wiley   +1 more source

A hybrid detection algorithm for 5G OTFS waveform for 64 and 256 QAM with Rayleigh and Rician channels

Open Engineering
Signal detection in orthogonal time frequency space modulation is one of the critical aspects for enhancing the throughput of the beyond fifth-generation framework, especially in challenging environments characterized by high mobility and multipath ...
Kumar Arun, Alshahrani Haya Mesfer, Alotaibi Faiz, Nanthaamornphong Aziz   +3 more
doaj   +1 more source