Shucheng Ma

Role of Ce in the creep-oxidation interaction of 316LN austenitic stainless steel at 927 °C/30 MPa

XiaoQiang Hu, C. M. Tan, Renxian Yang, Kun Huang et autres

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Photoinduced Defluorinative Alkylamination of Alkenes with Trifluoromethylated Arenes and Anilines

Dazhen Shi, Simin Wang, Shucheng Ma, Xiaoyu Li et autres

Selective defluorinative functionalization of inexpensive and readily available trifluoromethylated arenes represents a promising synthetic strategy for accessing pharmaceutically valuable fluorinated motifs. However, such transformations typically rely on transition-metal catalysts, and the development of sustainable, metal-free catalytic systems, particularly for three-component coupling reactions, …

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Remote Double C(sp 3 )–H Bond Asymmetric Aminoboration of Unactivated Alkenes via Bimetallic Orthogonal Relay Catalysis

Jianjun Yin, Xiuping Yuan, Lihan Zhu, Simin Wang et autres

Catalytic remote C(sp 3 )–H bond functionalization via the “chain-walking” pathway has been recognized as a promising strategy for constructing diverse molecular frameworks. However, the accessible functionalization sites remain limited and predominantly focus on a single site, typically either the terminal position …

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Copper-catalyzed borylcyanation of unactivated alkenes via cyano group translocation

Xiuping Yuan, Jiamin Yuan, Jiaqiong Sun, Jianjun Yin et autres

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Catalytic asymmetric hydroalkylation of 1,1-dialkyl-substituted alkenes with unactivated alkyl electrophiles

Shucheng Ma, Lihan Zhu, Jianjun Yin, Lianghua Wang et autres

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Enantioselective copper-catalysed defluorinative alkylation of polyfluoroarenes with alkenes and 1,3-dienes

Dazhen Shi, Lihan Zhu, Ying Yan Jiang, Simin Wang et autres

bond with outstanding stereocontrol (up to 99% ee in most cases). This reaction proceeds under mild reaction conditions, demonstrating excellent functional group compatibility and high regio- and stereoselectivity. Experimental studies in conjunction with density functional theory (DFT) calculations were carried out to …

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Stereoconvergent Aminoboration of (Z/E)-Mixed Alkenes via Bimetallic Asymmetric Relay Catalysis

Jianjun Yin, Xiuping Yuan, Simin Wang, Dazhen Shi et autres

Methods for the enantioselective transformations of alkenes constitute one of the most frequently used strategies in synthetic chemistry. Despite tremendous advancements in this domain, achieving the asymmetric difunctionalization of ( Z / E )-mixed alkenes in a stereoconvergent manner poses a formidable …

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Radical Arylboration of Unactivated Alkenes via Visible-Light Catalysis

Xiaoyu Li, Menglin Yang, Simin Wang, Xiuping Yuan et autres

and aryl nitriles was developed, providing a mild and efficient approach to access useful β-aryl boronates in the absence of a transition-metal catalyst. This reaction undergoes a boron radical addition to alkene and a subsequent radical-radical coupling process. This approach showcases good …

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Effects of Ce on the precipitation behaviors and creep properties in 316LN austenitic stainless steel

Renxian Yang, Chongqing Tan, Hui Ma, Shucheng Ma et autres

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Design of gesture recognition mobile car based on YOLOv5

Shuo Xi, Zehua Song, Xingyu Zhu, Gongcheng Yin et autres

In response to the less referees in non -professional basketball events, this article will design a multi -functional basketball technology station based on deep learning gesture recognition and image -based car -based cars. While tracking the referee position, the corresponding gesture can …

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Effect of Ce on creep damage behavior of 316LN austenitic stainless steel at 700 °C

Renxian Yang, Shucheng Ma, Xin Xia Cai, Xiaoqiang Hu et autres

The effect of rare earth element Ce on creep damage behavior of 316LN austenitic stainless steel (316LN) at 700 °C was systematically investigated under stress ranging from 125 MPa to 200 MPa. The results show that the addition of 0.032 wt% Ce …

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Highly Regioselective Difluoroalkylarylation of Butadiene through a Nickel-Catalyzed Tandem Radical Process

Shucheng Ma, Fangjie Li, Guisheng Zhang, Lei Shi et autres

A nickel-catalyzed reaction of 1,3-butadiene with easily accessible difluoroalkyl bromides and arylboronic acids has been realized, affording the corresponding 1,4-difluoroalkylarylation products in good yields with high regioselectivities. The procedure can also be successfully extended to nonfluorinated alkyl bromides. A radical clock experiment …

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