Cover Feature: Site‐Selective C–H Amidation of 2‐Aryl Quinazolinones Using Nitrene Surrogates (Eur. J. Org. Chem. 46/2020)

Abstract

The Cover Feature shows the rhodium(III) and iridium(III)‐catalyzed C–H amidation reaction of 2‐aryl quinazolin‐4(3H)‐ones with a range of nitrene surrogates including dioxazolones dioxazolones, organic azides, and N‐methoxyamides through N‐assisted C–H activation. Complete site‐selectivity and functional group tolerance are observed. Notably, the large‐scale reaction and late‐stage functionalization highlight the synthetic potential of the developed protocol. This work is dedicated to Prof. Pierre H. Dixneuf for his outstanding contribution to organometallic chemistry and catalysis. More information can be found in the Full Paper by S. Hong, I. S. Kim et al.

Recent Advances in OLED Optical Design

“…Kim et al studied the viewing angle-dependent emission spectra of top-emitting OLEDs with and without an organic MLA on the top IZO electrode, Figure 14c. [56] The device with the MLA showed a very little angular spectral dependence, which is attributed to the reduced reflection at the IZO/MLAs interface (0.3%) compared to the IZO/air interface (11%), resulting in weakening of the cavity effect.…”

“…Reproduced with permission. [56] Copyright 2015, Elsevier Ltd. Copyright 2016, American Chemical Society.…”

“…c) Viewing angle dependent spectrum of a single color top-emitting OLED (1) without MLA and (2) with MLA and the intrinsic PL spectrum of Ir(ppy) 2 tmd. Reproduced with permission [56]. Copyright 2015, Elsevier Ltd.…”

Pore engineering of metal-organic frameworks with coordinating functionalities

“…Lastly, the different pore environments of the surface of MOF crystals and the inside of MOF crystals should be carefully deliberated. Although the surface of MOF crystal has more free spaces for diffusion and allows the fast conversion for catalytic reactions, the reaction environments, especially for stereospecific reactions, are significantly differed from the reaction site at the inside of framework [305][306][307]. Taking the above limitations and issues into account, it is anticipated that the separated designs for catalytic sites at the surface of MOFs and inside of crystals, thus enabling real multi-functional and efficient catalyst platform from MOFs by pore engineering.…”