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pro vyhledávání: '"Li-Jie Cheng"'
Autor:
Li-Jie Cheng, 鄭立傑
94
In the wireless environment, the channel condition varies due to several factors, especially in mobile ad hoc networks. Previous researches use SNR thresholds to determine the channel condition. However, SNR thresholds may not be an accurate
In the wireless environment, the channel condition varies due to several factors, especially in mobile ad hoc networks. Previous researches use SNR thresholds to determine the channel condition. However, SNR thresholds may not be an accurate
Externí odkaz:
http://ndltd.ncl.edu.tw/handle/96732255557812977502
Autor:
Li-Jie Cheng, 鄭立傑
88
The purpose of this thesis is to develop a modified Delaunay triangulation to generate adaptive finite-element-meshes for structures of machine parts for their stress concentration analysis. We illustrate the concept of the method with some s
The purpose of this thesis is to develop a modified Delaunay triangulation to generate adaptive finite-element-meshes for structures of machine parts for their stress concentration analysis. We illustrate the concept of the method with some s
Externí odkaz:
http://ndltd.ncl.edu.tw/handle/58378369333811418185
Publikováno v:
In Energy 1 August 2018 156:95-102
Autor:
Neal P. Mankad, Li-Jie Cheng
Publikováno v:
Accounts of Chemical Research. 54:2261-2274
Transition metal-catalyzed carbonylation reactions represent a direct and atom-economical approach to introduce oxygen functionality into organic compounds, with CO acting as an inexpensive and readily available C1 feedstock. Despite the long history
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b4a76a11f569d3d2955709c318a223f
https://doi.org/10.1021/acs.accounts.1c00115
https://doi.org/10.1021/acs.accounts.1c00115
Akademický článek
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Publikováno v:
Angewandte Chemie. 133:2122-2126
A copper-catalyzed carbonylative borylation of unactivated alkyl halides has been developed, enabling efficient synthesis of aliphatic potassium acyltrifluoroborates (KATs) in high yields by treating the in situ formed tetracoordinated acylboron inte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f031c1376abb745c9d7a1c6c7796bae
https://doi.org/10.1002/ange.202012373
https://doi.org/10.1002/ange.202012373
Autor:
Neal P. Mankad, Li-Jie Cheng
Publikováno v:
Journal of the American Chemical Society. 142:80-84
A Cu-catalyzed carbonylative silylation of unactivated alkyl halides has been developed, enabling efficient synthesis of alkyl-substituted acylsilanes in high yield. A variety of functional groups are tolerated under the mild reaction conditions, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5453829771de49133f484dff88c2742
https://doi.org/10.1021/jacs.9b12043
https://doi.org/10.1021/jacs.9b12043
Autor:
Li-Jie Cheng, Neal P. Mankad
Publikováno v:
Chemical Society reviews. 49(22)
Transition metal-catalysed cross-coupling reactions are widely used for construction of carbon-carbon and carbon-heteroatom bonds. However, compared to aryl or alkenyl electrophiles, the cross-coupling of unactivated alkyl electrophiles containing β
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::016e12ee1df00dc897d0eedccbf21846
https://pubmed.ncbi.nlm.nih.gov/32458840
https://pubmed.ncbi.nlm.nih.gov/32458840
Autor:
Li-Jie Cheng, Neal P. Mankad
Publikováno v:
Angewandte Chemie. 130:10485-10489
Reported is a general procedure to synthesize tetrasubstituted enones, which are borylated in the β-position, using a copper-catalyzed four-component coupling reaction of simple chemical feedstocks: internal alkynes, alkyl halides, bis(pinacolato)di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d41bd484afdbfc30761ec4f3fcfcc11d
https://doi.org/10.1002/ange.201804883
https://doi.org/10.1002/ange.201804883
Publikováno v:
Synlett. 29:1675-1682
Metal-catalyzed reactions of propargylic substrates have been widely studied. Of this reaction class, Cu-catalyzed methods have received much attention within the past decade, with Cu-allenylidenes being proposed as key reactive intermediates. This S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4099f0d1ddf1d9765b0f247ba5502bf
https://doi.org/10.1055/s-0036-1591997
https://doi.org/10.1055/s-0036-1591997