6415-73-2Relevant academic research and scientific papers
Cu(I)-Catalyzed Intramolecular Tandem Cyclization of N-Indole-Tethered Cyclopropenes: Synthesis of Functionalized Hydrogenated Diazabenzo[ a]cyclopenta[ cd]azulene Derivatives
Li, Peng-Hua,Yang, Song,Hao, Tong-Gang,Xu, Qin,Shi, Min
, (2019/05/07)
A Cu(I)-catalyzed [3 + 2] intramolecular cycloaddition reaction of N-indole-tethered cyclopropenes is presented in this paper. This reaction starts from the formation of ?-allyl cationic intermediate or its resonance-stabilized metal carbenoid intermediate upon activation of cyclopropene with Cu(I) catalyst and a Friedel-Crafts-type cyclization to give functionalized hydrogenated diazabenzo[a]cyclopenta[cd]azulenes in good to excellent yields along with moderate to good dr values. The asymmetric variant of this cycloaddition reaction can be realized, giving the desired products with moderate ee values.
ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES
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, (2019/10/29)
An organic light emitting device (OLED) that includes an anode, a cathode, and an organic layer disposed between the anode and the cathode. The organic layer includes a metal compound that comprises a ligand LA of Formula I, wherein the dashed
RhI-Catalyzed Carbonylative [3+1] Construction of Cyclobutenones via C?C σ-Bond Activation of Cyclopropenes
Xu, Wen-Bin,Li, Changkun,Wang, Jianbo
, p. 15786 - 15790 (2018/10/15)
With a catalytic amount of Rh(cod)2BF4 and dppm, cyclopropenes undergo a direct carbonylative [3+1] cycloaddition reaction under an atmosphere of CO to produce the cyclobutenones in excellent yields, in which the regio- and diastereoselectivities can be controlled in certain cases with the help of chelating groups. Cyclobutenone with a chiral 4-position was prepared by diastereoselective induction. Rhodacyclopentenone has been determined as the key intermediate, as it was synthesized and applied to the reductive elimination step.
The Attempted Generation of a Methylene-Bridged Trimethylenemethane Biradical (1,3-Diphenyl-2-methylenecyclobutane-1,3-diyl) by Oxidation of endo-1,3-Diphenyl-2-(phenylselenomethyl)bicyclobutane.
Bushby, Richard J.,Jesudason, Malini V.
, p. 1144 - 1170 (2007/10/02)
Copper-catalysed addition of ethyl diazoacetate to diphenylacetylene and hydrolysis gives 1,2-diphenylcyclopropane-3-carboxylic acid (18b).Conversion to the acid chloride (18c) and reduction with lithium aluminium tri-tert-butoxy hydride gives 1,2-dipheny
Small Rings, 33. Attempts to Synthesize Diphenyltetrahedrane
White, Emil H.,Winter, Rudolph E. K.,Graeve, Rolf,Zirngibl, Ulrich,Friend, Earl W.,et al.
, p. 3906 - 3915 (2007/10/02)
Carbene 7, formed on photochemical or thermal excitation of (2,3-diphenyl-2-cyclopropen-1-yl)diazomethane (6i), splits mostly into two acetylenes 8 and 9 instead of undergoing an intramolecular cycloaddition.Photolysis of the Masamune ketone 16 depending on the reaction conditions gives either p-terphenyl or a mixture of the two cyclooctatetraens 18 and 19.The intermediate formation of tetrahedrane 10 would fit into the mechanistic picture of this fragmentation.
