Asymmetric Brønsted Base Catalyzed and Directed [3+2] Cycloaddition of 2-Acyl Cycloheptatrienes with Azomethine Ylides
作者:Vibeke H. Lauridsen、Lise Ibsen、Jakob Blom、Karl Anker Jørgensen
DOI:10.1002/chem.201600255
日期:2016.3.1
the 1,3‐dipolar cycloaddition product in high yields and up to 99 % ee. It is also shown that the diene formed by the reaction can undergo stereoselectivedihydroxylation, bromination, and cycloaddition reactions. Finally, based on experimental observations, some mechanistic considerations are discussed.
PhIO as a Powerful Cyclizing Reagent: Regiospecific [3+2]-Tandem Oxidative Cyclization of Imine toward Cofacially Self-Aggregated Low Molecular Mass Organic Materials
作者:Palash Pandit、Nirbhik Chatterjee、Samiran Halder、Sandip K. Hota、Amarendra Patra、Dilip K. Maiti
DOI:10.1021/jo8028136
日期:2009.3.20
The powerful cyclization and tandem oxidation property of environmentallybenign PhIO is developed for the first time, which leads to regiospecific [3+2]-tandem oxidative cyclization of imine at room temperature in rapid access to a new class of compounds, 1,2-functionalized 4,5-diarylimidazoles, in excellent yield with synthetic efficiency. Size, shape, and activity of the involved nanoreactors for
Diastereoselective lithium salt-assisted 1,3-dipolar cycloaddition of azomethine ylides to the fullerene C60
作者:Vitaliy A. Ioutsi、Alexander A. Zadorin、Pavel A. Khavrel、Nikita M. Belov、Natalia S. Ovchinnikova、Alexey A. Goryunkov、Oleg N. Kharybin、Eugenii N. Nikolaev、Marina A. Yurovskaya、Lev N. Sidorov
DOI:10.1016/j.tet.2010.02.057
日期:2010.4
5-substituted 3,4-fulleroproline esters based on the lithium salt-assisted cycloaddition of azomethine ylides has been developed. A series of the fulleroproline esters containing either electron donating or electron withdrawing substituents was prepared with high yields and diastereoselectivities provided by the S-trans-configuration of ylide generated in situ from the corresponding Schiff base in the presence