Diverse ring-opening reactions of rhodium η4-azaborete complexes

Autor:	Rüdiger Bertermann, Felipe Fantuzzi, Tom E. Stennett, Holger Braunschweig, Torsten Thiess, Marius Schäfer, Merlin Heß, Marvin Schock
Rok vydání:	2020
Předmět:	chemistry.chemical_classification Aryl chemistry.chemical_element Alkyne General Chemistry Ring (chemistry) Medicinal chemistry Rhodium chemistry.chemical_compound Deprotonation chemistry Cyclooctene Alkyl Bond cleavage
Zdroj:	Chemical Science. 11:9134-9140
ISSN:	2041-6539 2041-6520
Popis:	Sequential treatment of [Rh(COE)2Cl]2 (COE = cyclooctene) with PiPr3, alkyne derivatives and tBuNBMes (Mes = 2,4,6-trimethylphenyl) provided functionalized rhodium η4-1,2-azaborete complexes of the form (η4-azaborete)RhCl(PiPr3). The scope of this reaction was expanded to encompass alkynes with hydrogen, alkyl, aryl, ferrocenyl, alkynyl, azaborinyl and boronate ester substituents. Treatment of these complexes with PMe3 led to insertion of the rhodium atom into the B–C bond of the BNC2 ring, forming 1-rhoda-3,2-azaboroles. Addition of N-heterocyclic carbenes to azaborete complexes led to highly unusual rearrangements to rhodium η2,κ1-allenylborylamino complexes via deprotonation and C–N bond cleavage. Heating and photolysis of an azaborete complex also led to rupture of the C–N bond followed by subsequent rearrangements, yielding an η4-aminoborylallene complex and two isomeric η4-butadiene complexes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3b028ca4a415ea4f6f6597a2ca17c8f8 https://doi.org/10.1039/d0sc02283g Zobrazit plný text záznamu