Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Xiao-Jun Fang"'
Publikováno v:
Applied Sciences, Vol 13, Iss 3, p 1770 (2023)
The fastening spring of a rail fastening system serves as an important connection in transferring the train load to the sleeper via rails on railway tracks. During initial fastening, a large tensile stress exceeding the yield stress can occur in the
Externí odkaz:
https://doaj.org/article/66ac2855cf784be1a179a58e95709dca
Publikováno v:
Applied Sciences, Vol 11, Iss 24, p 12074 (2021)
Rail clips are essential components of rail fastening systems that clamp the rails to sleepers. Fatigue damage of rail clips has been recently reported in railway lines. However, there has been a lack of research investigating this fatigue issue. The
Externí odkaz:
https://doaj.org/article/868530fb447240c594d74f9066755f5d
Publikováno v:
International Journal of Steel Structures. 23:834-843
Publikováno v:
Organic Chemistry Frontiers. 10:430-439
A highly enantioselective palladium-catalyzed hydrosilylation reaction of prochiral 1,1-disubstituted cyclopropenes to access a wide variety of silylcyclopropanes bearing a quaternary carbon-stereocenter with good diastereo- and enantioselectivities.
Publikováno v:
Chemical Science. 14:1123-1131
A highly enantioselective palladium-catalyzed hydrosilylation of 1,3-diynes with dihydrosilanes was established for the facile preparation of Si-stereogenic enynes and an enyne-linked chiral polymer (polyenyne) in good yields with excellent ees.
Autor:
Li-Wen Xu, Fang-Ying Ling, Wei-Sheng Huang, Xiao-Jun Fang, Yu-Ming Cui, Fei Ye, Zheng Xu, Jian Cao, Hua Yang
Publikováno v:
Synthesis. 55:1577-1585
The transition-metal-catalyzed synthesis of chiral silacycles is a challenging processes in organosilicon chemistry. Herein, we report a facile and regioselective synthesis of a novel class of 2,3-dihydrosilole derivatives with good yields via the pa
Publikováno v:
Organic Chemistry Frontiers. 9:5891-5898
An unprecedented and convenient Si–C(sp) bond-forming cross-coupling of alkynyl bromides with hydrosilanes has been established for the facile synthesis of alkynylsilanes in good yields and with excellent chemoselectivity.
Publikováno v:
Organic Chemistry Frontiers. 9:5272-5280
A highly regioselective silylation of unsymmetric gem-difluorocyclopropenes was achieved by the capture of in-situ formed silyl metal intermediates, which gave structurally diverse silyldifluorocyclopropanes with good yields and stereoselectivity.
Autor:
Yan Zeng, Xiao‐Jun Fang, Ren‐He Tang, Jing‐Yu Xie, Feng‐Jiao Zhang, Zheng Xu, Yi‐Xue Nie, Li‐Wen Xu
Publikováno v:
Angewandte Chemie International Edition. 61
Strategies on the construction of enantiomerically pure silicon-stereogenic silanes generally relies on desymmetrization of prochiral and symmetric substrates. However, dynamic kinetic asymmetric transformations of organosilicon compounds have remain
Publikováno v:
Materials Science Forum. 1035:534-538
The influence of temperature, flow rate, PH value, and oxygen content on the corrosion law in the carbon dioxide salt solution of J55 oil casing was investigated by the corrosion weight loss method. The results showed that with the increase of temper