One-Pot Homolytic Aromatic Substitutions/HWE Olefinations under Microwave Conditions for the Formation of a Small Oxindole Library
摘要:
An efficient one-pot sequence comprising a homolytic aromatic substitution followed by an ionic Horner-Wadsworth-Emmons olefination for the preparation of a small library of alpha,beta-unsaturated oxindoles is presented. Microwave-induced heating is used to conduct these reactions. The homolytic aromatic substitution is mediated by the persistent radical effect.
Palladium/Copper-Catalyzed Oxidative CH Alkenylation/N-Dealkylative Carbonylation of Tertiary Anilines
作者:Renyi Shi、Lijun Lu、Hua Zhang、Borui Chen、Yuchen Sha、Chao Liu、Aiwen Lei
DOI:10.1002/anie.201303911
日期:2013.9.27
CH/CN activation: The first palladium/copper‐catalyzed aerobic oxidative CH alkenylation/N‐dealkylative carbonylation of tertiary anilines has been developed. Various functional groups were tolerated and acrylic ester could also be suitable substrates. This transformation provided efficient and straightforward synthesis of biologically active 3‐methyleneindolin‐2‐one derivatives from cheap and simple
Ç H / C Ñ活化:第一钯/铜催化氧化好氧Ç ħ烯基/ Ñ叔苯胺-dealkylative羰基化得到了发展。可以容忍各种官能团,丙烯酸酯也可以用作合适的底物。这种转化提供了从廉价,简单的底物中高效,直接地合成具有生物活性的3-亚甲基吲哚-2-酮衍生物的功能。
Tandem Horner–Wadsworth–Emmons/Heck procedures for the preparation of 3-alkenyl-oxindoles: the synthesis of Semaxanib and GW441756
作者:Jana Lubkoll、Alessia Millemaggi、Alexis Perry、Richard J.K. Taylor
DOI:10.1016/j.tet.2010.03.018
日期:2010.8
developed to provide rapid access to 3-alkenyl-oxindoles from α-halo-anilides. This one-pot microwave accelerated process proceeds with catalytic palladium(II) acetate or tetrakis(triphenylphosphine)palladium, and has been used to prepare a range of adducts derivedfrom aromatic, heteroaromatic and aliphatic aldehydes. The procedures can be used to prepare N-unprotected oxindoles directly and the applicability
Palladium-Catalyzed Intramolecular 5-<i>exo</i>-<i>dig</i> Hydroarylations of <i>N</i>-Arylpropiolamides: Thermodynamics-Controlled Stereoselective Synthesis of 3-Methyleneoxindoles
作者:Tao-Shan Jiang、Ri-Yuan Tang、Xing-Guo Zhang、Xin-Hua Li、Jin-Heng Li
DOI:10.1021/jo901963g
日期:2009.11.20
has been developed for the stereoselectivesynthesis of 3-(monosubstituted methylene)oxindoles. In the presence of Pd(OAc)2 and dppf, a variety of N-arylpropiolamides successfully underwent the intramolecular hydroarylation reaction to afford the corresponding 3-(monosubstituted-methylene)oxindoles in moderate to excellent yields. It is noteworthy that the stereoselectivity of the reaction can be controlled
An efficient one-pot sequence comprising a homolytic aromatic substitution followed by an ionic Horner-Wadsworth-Emmons olefination for the preparation of a small library of alpha,beta-unsaturated oxindoles is presented. Microwave-induced heating is used to conduct these reactions. The homolytic aromatic substitution is mediated by the persistent radical effect.