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#Organic Chemistry #
Catalytic Carbonylative Rearrangement of Norbornadiene via Dinuclear Carbon–Carbon Oxidative Addition
J. Am. Chem. Soc.
September 17, 2017
10.1021/jacs.7b08691
Douglas R. Hartline, Matthias Zeller, and Christopher Uyeda
Abstract: Single bonds between carbon atoms are inherently challenging to activate using transition metals; however, ring-strain release can provide the necessary thermodynamic driving force to make such processes favorable. In this report, we describe a strain-induced C–C oxidative addition of norbornadiene. The reaction is mediated by a dinuclear Ni complex, which also serves as a catalyst for the carbonylative rearrangement of norbornadiene to form a bicyclo[3.3.0] product.
Link to CBG：
http://www.chembeango.com/news/art?id=7745
Link to the article：
http://pubs.acs.org/doi/10.1021/jacs.7b08691
#Organic Chemistry#
Branched-Selective Intermolecular Ketone α-Alkylation with Unactivated Alkenes via an Enamide Directing Strategy
J. Am. Chem. Soc.
September 17, 2017
10.1021/jacs.7b08581
Dong Xing and Guangbin Dong
Abstract: We describe a strategy for intermolecular branched-selective α-alkylation of ketones using simple alkenes as the alkylating agents. Enamides derived from isoindolin-1-one provide an excellent directing template for catalytic activation of ketone α-positions. High branched selectivity is obtained for both aliphatic and aromatic alkenes using a cationic iridium catalyst. Preliminary mechanistic study favors an Ir?C migratory insertion pathway.
Link to CBG：
http://www.chembeango.com/news/art?id=7744
Link to the article：
http://pubs.acs.org/doi/10.1021/jacs.7b08581
#Material#
In Situ Neutron Depth Profiling of Lithium Metal-Garnet Interfaces for Solid State Batteries
J. Am. Chem. Soc.
September 17, 2017
10.1021/jacs.7b07904
Chengwei Wang, Yunhui Gong, Jiaqi Dai, Lei Zhang, Hua Xie, Glenn Pastel, Boyang Liu, Eric Wachsman, Howard Wang, and Liangbing Hu
Abstract: The garnet-based solid state electrolyte (SSE) is considered a promising candidate to realize all solid state lithium (Li) metal batteries. However, critical issues require additional investigation before practical applications become possible, among which high interfacial impedance and low interfacial stability remain the most challenging. In this work, neutron depth profiling (NDP), a nondestructive and uniquely Li-sensitive technique, has been used to reveal the interfacial behavior of garnet SSE in contact with metallic Li through in situ monitoring of Li plating-stripping processes. The NDP measurement demonstrates predictive capabilities for diagnosing short-circuits in solid state batteries. Two types of cells, symmetric Li/garnet/Li (LGL) cells and asymmetric Li/garnet/carbon-nanotubes (LGC) are fabricated to emulate the behavior of Li metal and Li-free Li metal anodes, respectively. The data implies the limitation of Li-free Li metal anode in forming reliable interfacial contacts, and strategies of excessive Li and better interfacial engineering need to be investigated.
Link to CBG：
http://www.chembeango.com/news/art?id=7743
Link to the article：
http://pubs.acs.org/doi/10.1021/jacs.7b07904
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