Thermal Rearrangement of {[2-(Arylmethylene)cyclopropyl]methyl}(phenyl)sulfanes and Selanes
作者:Guo-Qiang Tian、Jia Li、Min Shi
DOI:10.1021/jo7021636
日期:2008.1.1
[2-(Arylmethylene)cyclopropyl]methyl}(phenyl)sulfanes and [2-(arylmethylene)cyclopropyl]methyl}(phenyl)selanes, generated in situ from 2-(arylmethylene)cyclopropylcarbinols with sodium benzenethiolate and sodium benzeneselenolate, could undergo rearrangement upon heating to afford (2-arylmethylidenebut-3-enyl)(phenyl)sulfanes and (2-arylmethylidenebut-3-enyl)(phenyl)selanes, in good to excellent
Palladium(ii)-catalyzed ring enlargement of 2-(arylmethylene)cyclopropylcarbinols: strong effect of substituent electronic nature on the reaction pathway
作者:Guo-Qiang Tian、Zhi-Liang Yuan、Zhi-Bin Zhu、Min Shi
DOI:10.1039/b804932g
日期:——
In the presence of Pd(II) catalyst and copper(II) bromide, 2-(arylmethylene)cyclopropylcarbinols undergo ring enlargement to deliver (arylcyclobutenyl)carbinols or hydrogenated furans in good yields under mild conditions; mechanisms accounting for the distinct products have been proposed on the basis of control and deuterium labeling experiments.
Lewis Acid Catalyzed Intramolecular Ring-Opening of Triazole-Substituted Methylenecyclopropanes: An Approach to 4H-[1,2,3]Triazolopyrazines and 4H-[1,2,3]Triazolo[1,4]diazepines