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Oxidations of N-coordinated Arsinidene and Stibinidene by Substituted Quinones: A Remarkable Follow-Up Reactivity

Rok: 2023

Druh publikace: článek v odborném periodiku

Název zdroje: ChemPlusChem

Název nakladatele: Wiley-VCH

Místo vydání: Weinheim

Strana od-do: e202300018

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Oxidace N-koordinovaného arsinidenu a stibinidenu substituovanými chinony: Pozoruhodná následná reaktivita	V tomto článku je studována reaktivita pniktinidenů [2-(DippN=CH)-6-(DippNHCH(2))C6H3]E (kde E=As (1) nebo Sb (2)) vůči substituovaným ortho- a para-chinonům.	oxidace; N-koordinace; arsiniden; stibiniden; substituce; chinony
eng	Oxidations of N-coordinated Arsinidene and Stibinidene by Substituted Quinones: A Remarkable Follow-Up Reactivity	The reactivity of pnictinidenes [2-(DippN=CH)-6-(DippNHCH(2))C6H3]E (where E=As (1) or Sb (2)) toward substituted ortho- and para-quinones is reported. The central pnictogen atom is easily oxidized by ortho-quinones closing five-membered EO2C2 ring. The oxidized antimony derivatives are stable species, while in the case of arsenic compounds the hydrogen of the pendant amino NHCH2 group cleaves one newly formed As-O bonds leading to the closure of a new azaarsole ring. Furthermore, a heating of these arsenic heterocycles resulted in a C-H bond activation at the NCH2 group involved in this heterocycle followed by a reductive elimination of corresponding catechols and arsinidene [2,6-(DippN=CH)C6H3]As. Using of para-quinones, resulted in the oxidation of the central atom with a concomitant hydrogen migration from NHCH2 group even in the case of the antimony derivatives. The reductive elimination of hydroquinones is in this case feasible for all compounds. Studied compounds were characterized by multi-nuclear NMR, IR and Raman spectroscopy and single-crystal X-ray diffraction analysis. The theoretical study focusing the key compounds and reactions is also included.	low valent compounds; main group elements; oxidative addition; reductive elimination

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