Pd-Catalyzed Carbonylative Cross-Coupling Reactions by Triorganoindiums: Highly Efficient Transfer of Organic Groups Attached to Indium under Atmospheric Pressure
作者:Phil Ho Lee、Sung Wook Lee、Kooyeon Lee
DOI:10.1021/ol034167j
日期:2003.4.1
[reaction: see text] A highly atom-efficient synthetic method of unsymmetrical ketones was developed by using trialkyl- and triarylindiums, which could be employed as effective cross-coupling partners in Pd-catalyzed carbonylative cross-coupling reactions with a variety of organic electrophiles. The present method produced unsymmetrical ketones and 1,4-diacylbenzenes in good yields with highly efficient
Magnesiated Unsaturated Silylated Cyanohydrins as Synthetic Equivalents of Aromatic and Heterocyclic Grignard Reagents Bearing a Ketone or an Aldehyde
作者:Ching-Yuan Liu、Hongjun Ren、Paul Knochel
DOI:10.1021/ol052792d
日期:2006.2.1
[reaction: see text] The preparation of iodo-substituted aryl, heteroaryl, or cycloalkenyl ketones as silylated cyanohydrins allows the smooth performance of an I/Mg-exchange using i-PrMgCl.LiCl. A facile deprotection of the resulting functionalized products obtained by a reaction with electrophiles (acid chlorides, allylicbromide, benzylidene-p-toluenesulfonamide, and 3-iodocyclohexenone) produces
polymer-supported 2-monosubstituted 1,3-dithianes from soluble copolymers bearing 1,3-propanedithiol groups, their lithiation, reactions with electrophiles such as aldehydes, ketones, α,β-unsaturated ketones and oxiranes, and cleavage of the produced dithioketal-protected α- or β-hydroxyketones with various reagents have been studied.