作者:Sergiy V. Yemets、Tatyana E. Shubina、Pavel A. Krasutsky
DOI:10.1039/c3ob27348b
日期:——
terminal alkenes with 3-iodopropene derivatives and hydrogeniodide formation within minutes at room temperature. The optimal molar ratio of iodine to substrate was decreased to 1 : 1 when hydrogeniodide formed was oxidized on a platinum anode. The electrolytic oxidation recovers iodine as a reagent and diminishes the hydrogeniodide inhibitory action to accomplish the monoiodination. The proposed reaction
Rhodium-Catalyzed Regioselective Carboacylation of Olefins: A CC Bond Activation Approach for Accessing Fused-Ring Systems
作者:Tao Xu、Guangbin Dong
DOI:10.1002/anie.201202771
日期:2012.7.23
Cut and sew: A rhodium‐catalyzed regioselective carboacylation reaction of benzocyclobutenones was developed (see scheme). Directed by the pendant olefins, the C1C2 bond is selectively cleaved rather than the C1C8 bond. Subsequent alkene insertion leads to complex fused‐ring systems. This reaction provides facile access to natural‐product‐like polycyclic structures in a chemoselective and atom‐economic
Intramolecular Pauson-Khand Reaction of Various 2-Aryl-1,6-Enynes: Synthesis of Bicyclic Compounds Bearing Quaternary Carbon Center
作者:Miyuki Ishizaki、Hiroshi Satoh、Osamu Hoshino
DOI:10.1246/cl.2002.1040
日期:2002.10
Intramolecular Pauson-Khand reaction of various 2-aryl-1-hepten-6-ynes and its aza-derivative (acyclic exo-methylene compounds) efficiently produced 1-aryl-bicyclo[3.3.0] octenones and azaoctenone bearing quaternary carboncenter in good yields. The reaction of 1,7-enynes was also investigated.
Palladium-Catalyzed Cascade Allylative Dicarbofunctionalization of Aryl Phenol-Tethered Alkynes with Allyl Iodides: Synthesis of Skipped Dienes
作者:Anjia Liu、Dongmei Chi、Shufeng Chen
DOI:10.1021/acs.orglett.1c03073
日期:2021.11.5
A palladium-catalyzed cascade allylative dicarbofunctionalization of aryl phenol-tethered alkynes with allyl iodides is described. A series of polysubstituted spirocyclo-containing skipped dienes with an all-carbon tetrasubstituted alkene unit are synthesized through this convenient process. The cascade reaction proceeds selectively through dearomative C-allylation instead of O-allylation of aryl phenols
Tuning of Regioselectivity in Inorganic Iodide-Catalyzed Alkylation of 2-Methoxyfurans via Electronic and Steric Effects
作者:Jie Chen、Shengjun Ni、Shengming Ma
DOI:10.1002/adsc.201100337
日期:2012.4.16
may be cleaved to afford the corresponding lactonic anion. Due to the presence of an electron‐withdrawing group at the 3‐position, the alkylation with normal organic iodides occurred at the 3‐position highly regioselectively. However, when electron‐deficient allylic iodides with an electron‐withdrawing group at the 2‐position were used the 5‐alkylation products were formed as the major products with sodium