Zobrazeno 1 - 10
of 507
pro vyhledávání: '"Jun Xuan"'
Publikováno v:
Green Synthesis and Catalysis, Vol 5, Iss 3, Pp 191-194 (2024)
A copper-catalyzed three-component reaction of diazo compounds, nitriles, and azodicarboxylates to construct 2,3-dihydro-1,2,4-triazoles is reported. Key to the success is the utilization of azodicarboxylates to trap the in-situ formed nitrile ylides
Externí odkaz:
https://doaj.org/article/075f68feeab04b06868765e8bb0d4d43
Autor:
Yang Xie, Ruilong Zhang, Ze‐Le Chen, Mengtao Rong, Hui He, Shaofei Ni, Xiang‐Kui He, Wen‐Jing Xiao, Jun Xuan
Publikováno v:
Advanced Science, Vol 11, Iss 3, Pp n/a-n/a (2024)
Abstract Vinyldiazo compounds are one of the most important synthons in the construction of a cyclic ring. Most photochemical transformations of vinyldiazo compounds are mainly focusing on utilization of their C═C bond site, while reactions taking
Externí odkaz:
https://doaj.org/article/bc0e2451f657446684c708097251407b
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 19, Iss 1, Pp 100-106 (2023)
Herein, we report an unprecedented Rh(III)-catalyzed C–H activation/annulation cascade of readily available enaminones with iodonium ylides towards the convenient synthesis of isocoumarins. This coupling system proceeds in useful chemical yields (u
Externí odkaz:
https://doaj.org/article/bcf62d9ab6924e71b7524744a6499678
Publikováno v:
Tetrahedron Chem, Vol 7, Iss , Pp 100040- (2023)
Herein, we developed a mild and efficient photoredox-enabled remote radical group migration with the utilization of diazoalkanes as radical precursors, giving access to various valuable 1,7-dicarbonlys in moderate to good yields. A diverse set of mig
Externí odkaz:
https://doaj.org/article/d93802cded854583a1bc3a626acb3ca2
Publikováno v:
Green Synthesis and Catalysis, Vol 3, Iss 2, Pp 194-197 (2022)
Visible light promoted C–O bond formation reaction through O–H insertion of acylsilanes with oximes has been developed. The reaction occurred under mild reaction conditions (sole blue LED irradiation in the absence of any catalysts or additives)
Externí odkaz:
https://doaj.org/article/cb6f5f7cc2bd48ffa7d5c3fb42437b40
Autor:
Cheng Han Ng, Yip Han Chin, Marcus Hon Qin Tan, Jun Xuan Ng, Samantha Peiling Yang, Jolene Jiayu Kiew, Chin Meng Khoo
Publikováno v:
Endocrine Connections, Vol 9, Iss 7, Pp 724-735 (2020)
Purpose: Primary hyperparathyroidism (PHPT) is a common condition affect ing people of all ages and is mainly treated with parathyroidectomy. Cinacalcet has been widely used in secondary or tertiary hyperparathyroidism, but the use of cinacalcet in P
Externí odkaz:
https://doaj.org/article/55afe8ed530641debca3d9a011e41b60
Autor:
Hui Zhang, Jun Xuan, Tian-He Chen, Ze-Xin Chen, Liao-Jun Sun, Nai-Feng Tian, Xiao-Lei Zhang, Xiang-Yang Wang, Yan Lin, Yao-Sen Wu
Publikováno v:
Journal of Investigative Surgery, Vol 33, Iss 2, Pp 134-140 (2020)
Purpose: To measure the projection of the most anterior line of the spinal canal on lateral radiographs of the vertebra (C3–L5) and evaluate the efficacy of the safety line (SL) in preventing intraspinal cement leakage in percutaneous kyphoplasty (
Externí odkaz:
https://doaj.org/article/bca9e0ced7df441299598ae21cf0b28a
Autor:
Chaofeng Wang, Mingquan Xu, Jun Xuan, Haibo Li, Shan Zheng, Yuan Zhao, Wuchang Zhang, Tian Xiao
Publikováno v:
Ecological Indicators, Vol 133, Iss , Pp 108441- (2021)
Mesoscale eddies are a common feature of world oceans. However, their influence on microzooplankton has not been well studied. This study investigated the impact of warm eddies (originating from the Kuroshio Current) on planktonic ciliates in the nor
Externí odkaz:
https://doaj.org/article/a78421f045b7498ca43e076bfc6ee467
Publikováno v:
Frontiers in Microbiology, Vol 12 (2021)
Located from 35° to 45° latitude in both hemispheres, the transition zone is an important region with respect to the planktonic biogeography of the sea. However, to the best of our knowledge, there have been no reports on the existence of a tintinn
Externí odkaz:
https://doaj.org/article/753a5d87f79a426f8058009aadac3c00
Autor:
Kaixuan Cui, Yi Dong, Xiaoxia Sun, Li Zhao, Haijian Du, Jia Liu, Chaofeng Wang, Chen Liang, Yicong Zhao, Si Chen, Jun Xuan, Suheng Li, Yuan Zhao, Tian Xiao
Publikováno v:
Frontiers in Marine Science, Vol 8 (2021)
Coliform bacteria (CB) can be used as an indicator of seawater quality. Long-term monitoring of seawater quality based on CB abundance is lacking in Jiaozhou Bay. In this study, CB abundance in surface seawater of 12 different stations in Jiaozhou Ba
Externí odkaz:
https://doaj.org/article/2e4cec0a0e4c44bbb6395b47eb59fba5