RESUMEN

Correction for 'Diastereoselective synthesis of tetrahydrobenzo[b]azocines by Lu(OTf)3-catalyzed [4+4] cycloaddition of donor-acceptor cyclobutanes with anthranils' by Meifeng Hou et al., Chem. Commun., 2022, 58, 5865-5868, https://doi.org/10.1039/D2CC00829G.

RESUMEN

The construction of N-heterocyclic eight-membered rings remains challenging due to unfavorable transannular strain. Herein, we report a Lu(OTf)3-catalyzed formal [4+4] cycloaddition reaction of cyclobutane 1,1-diesters with anthranils to deliver oxa-bridged eight-membered heterocycles. This methodology provides great potential to build complex azocine compounds from simple building blocks. Based on our preliminary mechanism studies, a probable mechanism for this annulation pathway has been proposed.

Asunto(s)

Ciclobutanos , Azocinas , Catálisis , Reacción de Cicloadición , Isoxazoles

RESUMEN

Li2 CO3 -passivated Li3 N with high stability is prepared by aging Li3 N powder in dry air, and is then used as an electrode additive for a Li(Li0.18 Ni0.15 Co0.15 Mn0.52 )O2 (LLMO) cathode material. The material shows a large irreversible capacity of 800 mA h g-1 during the first charge, with the formation of a Li2 N intermediate product. Acting as a Li+ sacrificial salt for a LLMO(+)/graphite(-) Li-ion battery, 2 wt % Li3 N results in a 10 % increase in discharge capacity. The Li2 N intermediate product reacts with the electrolyte, forming a uniform and regular surface film on the cathode. Moreover, chemical bonding between LLMO and N improves the electrode stability, resulting in excellent electrochemical performance.