A novel synthesis of spiro[2.6]nonadienones by the reaction of magnesium cyclopropylidenes with naphtholates and phenolates
摘要:
The sulfoxide-magnesium exchange reaction of aryl 1-chlorocyclopropyl sulfoxides with i-PrMgCl in THF at low temperature gave magnesium cyclopropylidenes. Treatment of the magnesium cyclopropylidenes with lithium naphtholates or phenolates resulted in the formation of spiro[2.6]nonadienones in up to 82% yield. The structure of the spiro[2.6]nonadienones was found to be dependent on the structure of the naphtholates and phenolates. (c) 2008 Elsevier Ltd. All rights reserved.
Copper-Catalyzed Electrochemical Selective B–H Oxygenation of <i>o</i>-Carboranes at Room Temperature
作者:Yik Ki Au、Hairong Lyu、Yangjian Quan、Zuowei Xie
DOI:10.1021/jacs.0c02490
日期:2020.4.15
Copper-catalyzed electrochemical selective cage B-H oxygenation of o-carboranes has been achieved for the first time. Under constant electric current (4.0 mA) at room temperature, copper-catalyzed cross-coupling of carboranyl amides with lithium phenolates results in the formation of B(4,5)-diphenolated-o-carboranes via direct B-H activation, whereas the use of lithium tert-butoxide affords B(4)-monooxygenated
Lanthanide(iii) 2-naphthoxide complexes stabilized by interligand non-covalent interactions
作者:Jessica R. Levin、Jun Gu、Patrick J. Carroll、Eric J. Schelter
DOI:10.1039/c2dt30445g
日期:——
Lithium–lanthanide-2-naphthoxide complexes are found to have solvent dependent solution structures and related monomeric/dimeric solid state structures. The incorporation of tetramethylguanidium cations into lanthanide 2-naphthoxide complexes stabilizes a complex structure both in solution and the solid state through bridging hydrogen bonds between the 2-naphthoxide ligands.