STEREOCHEMICAL FEATURES OF CYCLOADDITION OF HETEROAROMATIC<i>N</i>-YLIDES. SELECTIVE PARTICIPATION OF THE ANTI AND SYN YLIDES
作者:Otohiko Tsuge、Shuji Kanemasa、Shigeori Takenaka
DOI:10.1246/cl.1985.355
日期:1985.3.5
In the cycloaddition of heteroaromatic N-ylides to symmetrically substituted trans olefins, the anti ylide exclusively participates if the ylide is carbonyl-stabilized, while the syn ylide does if it has a substituent of non-carbonyl type. The cycloadducts isomerize into thermodynamically more stable isomers through a retro reaction.