Pd(II)-Catalyzed Tandem Heterocyclization of 1-(1-Alkynyl)cyclopropyl Oxime Derivatives for the Synthesis of Functionalized Pyrroles
作者:Dong Pan、Yin Wei、Min Shi
DOI:10.1021/acs.orglett.6b02068
日期:2016.8.5
An efficient approach for the synthesis of highly functionalized pyrroles has been developed by a Pd(TFA)2-catalyzed tandem heterocyclization of 1-(1-alkynyl)cyclopropyl oxime derivatives under mild conditions. The reaction first proceeded via an intramolecular nucleophilic attack followed by a ring-opening process and then intermolecular nucleophilic attack as well as protonation to afford the desired
Rhodium-Catalyzed Carbonylative Skeleton Rearrangement of 1,4-Enynes Tethered by a Cyclopropane Group
作者:Xiang-Ying Tang、Min Shi、Gen-Qiang Chen
DOI:10.1055/s-0034-1378633
日期:——
The carbonylative skeletonrearrangement of 1,4 enynes tethered by a cyclopropane group proceeded smoothly in the presence of [Rh(CO)(2)Cl](2) under CO atmosphere to give the corresponding 1,2,4,5,6,7-hexahydrocyclopenta[a]inden-3(3bH)-one derivatives in moderate yields.
在 [Rh(CO)(2)Cl](2) 存在下,在 CO 气氛下,由环丙烷基团束缚的 1,4 烯炔的羰基化骨架重排顺利进行,得到相应的 1,2,4,5,6, 7-hexahydrocyclopenta[a]inden-3(3bH)-one 衍生物,产率适中。
Rh(II)-Catalyzed Chemoselective Oxidative Amination and Cyclization Cascade of 1-(Arylethynyl)cycloalkyl)methyl Sulfamates
作者:Dong Pan、Yin Wei、Min Shi
DOI:10.1021/acs.orglett.7b01558
日期:2017.7.7
A Rh(II)-catalyzed chemoselective oxidative amination and cyclization cascade of 1-(arylethynyl)cycloalkyl)methyl sulfamates has been presented. For a cyclopropyl or cyclobutyl moiety containing alkynyl sulfamates, the reactions underwent a metallonitrene-initiated alkyne oxidation along with cyclopropyl ring expansion or alkoxyl moiety migration to give cyclobutane-fused or methylenecyclobutane-containing
Synthesis of Polysubstituted Pyrroles through the Tandem 1,3-Addition/5-<i>endo</i>-<i>dig</i>Cyclization of 1-(1-Alkynyl)cyclopropyl Imines
作者:Aurelija Urbanaitė、Inga Čikotienė
DOI:10.1002/ejoc.201600985
日期:2016.11
Cyclopropyl-tethered 3-alkynyl imines react with polarized-covalent-bond-containing compounds to give polyfunctionalized pyrroles. This provides a mild and effective method for the simultaneous introduction of halogen, chalcogen, or hydrogen groups to the 3-position of the pyrrole ring, together with the incorporation of halogen, azide, or alkoxy/aryloxy groups into the ethyl side-chain.