Photoaccelerated Reductive Coupling of Acid Chlorides with Conjugate Dienes and Styrenes by Use of Neodymium Metal in<i>N</i>,<i>N</i>-Dimethylacetamide
Upon photoirradiation, neodymium metal powder in N,N-dimethylacetamide (DMAC) exhibits excellent reducing ability for the reductive coupling of benzoyl chlorides with conjugate dienes and styrenes.
Reactions of 2-(Dialkylamino)arylacetonitriles with Acetylenes Under Basic Conditions. A Simple Synthesis of Substituted Mono and Diketones
作者:T. Zdrojewski、A. Jończyk
DOI:10.1055/s-1990-26839
日期:——
2-(Dialkylamino)arylacetonitriles 1 react with acetylenes 2a,b in dimethyl sulfoxide, powdered sodium hydroxide and triethylbenzylammonium chloride as a catalyst to give 3 and/or 4. The latter are formed via addition of anion 8 to immonium salt 9. The type of product formed depends on the basicity of amino moiety in 3. Furthermore, compound 1 adds to C-1 of acetylene 2c affording the vinyl derivatives 15. The products 3, 4, 11 and 15 are hydrolyzed to give ketones 5-7, 12 and 16, respectively.
Formation of 1,4-diketones via bis-acylation of the conjugated carbon–carbon double bonds in acrylates, acrylamides, methyl vinyl ketone and styrenes with aroyl chlorides promoted by samarium metal in DMF
作者:Yongjun Liu、Yongmin Zhang
DOI:10.1016/j.tet.2003.08.038
日期:2003.10
Promoted by samarium in DMF, aroyl chlorides react readily with conjugated carbon–carbondoublebonds in acrylates, acrylamides, methyl vinyl ketone and styrenes in a bis-acylation manner. These reactions proceed smoothly under mild conditions without the need of pretreating or activating the metallic samarium, affording the corresponding 1,4-diketones in good to excellent yields.
Samarium-Promoted Michael Addition between Aroyl Chlorides and Chalcones
作者:Jun Wan、Yongjun Liu、Yuanying Li、Yan Qi
DOI:10.1055/s-0030-1258287
日期:2010.12
A novel Michael addition type reaction between aroyl chlorides and chalcones was realized in the presence of samarium metal when N,N-dimethylformamide was used as a solvent. A variety of 1,4-diketones were thereby synthesized in moderate to good yields. The possible mechanism is also discussed.
Enone Synthesis via Palladium Catalyzed Reductive Carbonylation of Terminal Acetylenes
作者:Yoshinao Tamaru、Hirofumi Ochiai、Zen-ichi Yoshida
DOI:10.1016/s0040-4039(01)91188-8
日期:1984.1
Aryl vinyl ketones are prepared by the reaction of aryl iodides and terminal acetylenes in the presence of a catalytic amount of PdCl2(PPh3)2, Cp2TiCl2 and a stoichiometric amount of Zn-Cu under an atmospheric pressure of carbon monoxide.