Stereoselective Synthesis of Functionalized Cyclopropane Derivatives via α-Thiocyanate Ketone-Based Three-Component Reaction
作者:Bo Jiang、Shu-Jiang Tu、Fei-Yue Wu、Ying Li、Hui Feng、Qiong Wu、Feng Shi
DOI:10.1055/s-0030-1260096
日期:2011.8
ketone-based three-componentreactions have been established for the stereoselectivesynthesis of functionalized electron-deficient trans-cyclopropanes. The multicomponent reactions were conducted by reacting readily available and inexpensive starting materials under microwave irradiation. The procedures are very facile, highly stereoselective, and avoids the use of ylides. multicomponent reactions - cyclopropanes
Indium(I) bromide-promoted stereoselective preparation of cyclopropanes via sequential aldol-type coupling/elimination/Michael-induced ring closure reaction from α,α-dichloroacetophenone and aldehydes
作者:Clovis Peppe、Rafael Pavão das Chagas、Robert Alan Burrow
DOI:10.1016/j.jorganchem.2008.08.011
日期:2008.10
an-1-ones which can be converted to their trans-prop-2-en-1-ones derivatives upon reaction with an extra equivalent of InBr. The enones undergo Michael-induced ringclosurereactions with an extra equivalent of the initial enolate to afford the corresponding cyclopropane derivatives, according to a sequenced reaction mechanism.
Sulfur-Mediated Formal Allylic C–H Cyclopropanation of α-Methylstyrenes
作者:Tong Pan、Pingfan Li
DOI:10.1021/acs.joc.3c00546
日期:2023.6.2
Allylic C–H cyclopropanation of α-methylstyrene and its derivatives was realized through a one-pot two-step sequence, formally converting two aliphatic C–H bonds to C–C bonds with a good yield and high diastereoselectivity, thus providing a quick entry to the synthetically useful vinyl cyclopropane structures.