10486-58-5Relevant articles and documents
Synthesis of diselenadiazafulvalenes and influence of steric strain on their anodic behavior
Casar, Zdenko,Leban, Ivan,Marechal, Alenka Majcen-Le,Lorcy, Dominique
, p. 1568 - 1573 (2002)
A novel family of π-donor molecules, the diselenadiazafulvalenes (DSeDAFs), is presented. The synthetic approach to these donors, from o-nitroaniline, allows the formation of N,N′-dimethyldibenzo DSeDAF and N,N′-ethylenedibenzo DSeDAF. Comparative electrochemical study of these π-donor molecules demonstrates their excellent donor ability and the stabilizing effect of the ethylene bridge on the cation radical species.
The Importance of 1,5-Oxygen???Chalcogen Interactions in Enantioselective Isochalcogenourea Catalysis
Cockroft, Scott L.,Elmi, Alex,Frost, Aileen B.,Ling, Kenneth B.,McLaughlin, Calum,Morris, Rylie K.,Pascoe, Dominic J.,Slawin, Alexandra M. Z.,Smith, Andrew D.,Smith, Terry K.,Willoughby, Patrick H.,Woods, Andrew M.,Young, Claire M.,de la Houpliere, Alix
supporting information, p. 3705 - 3710 (2020/02/11)
The importance of 1,5-O???chalcogen (Ch) interactions in isochalcogenourea catalysis (Ch=O, S, Se) is investigated. Conformational analyses of N-acyl isochalcogenouronium species and comparison with kinetic data demonstrate the significance of 1,5-O???Ch interactions in enantioselective catalysis. Importantly, the selenium analogue demonstrates enhanced rate and selectivity profiles across a range of reaction processes including nitronate conjugate addition and formal [4+2] cycloadditions. A gram-scale synthesis of the most active selenium analogue was developed using a previously unreported seleno-Hugerschoff reaction, allowing the challenging kinetic resolutions of tertiary alcohols to be performed at 500 ppm catalyst loading. Density functional theory (DFT) and natural bond orbital (NBO) calculations support the role of orbital delocalization (occurring by intramolecular chalcogen bonding) in determining the conformation, equilibrium population, and reactivity of N-acylated intermediates.
Meso-ionic se- and s-containing tetrazoles
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, (2008/06/13)
This invention relates to meso-ionic tetrazole compounds of the formula: STR1 wherein X- is -S- or -Se- which are useful as photographic additives and to an intermediate useful in the preparation thereof having the formula: STR2