80673-31-0Relevant academic research and scientific papers
RhI-Catalyzed Carbonylative [3+1] Construction of Cyclobutenones via C?C σ-Bond Activation of Cyclopropenes
Xu, Wen-Bin,Li, Changkun,Wang, Jianbo
supporting information, 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.
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.
