Copper-Catalyzed Tandem <i>O</i>-Vinylation of Arylhydroxylamines/[3,3]-Rearrangement/Cyclization: Synthesis of Highly Substituted Indoles and Benzoindoles
arylhydroxylamine using vinyliodonium salts as vinylation reagents to generate a transient O-vinyl-N-arylhydroxylamine that rapidly undergoes a [3,3]-sigmatropic rearrangement and subsequent cyclization/rearomatization to form a substituted indole. A wide range of highly substituted indoles and benzoindoles can be afforded in good yields. This approach is readily scalable, and the scope and application of this process
1,1,1,3,3,3-Hexafluoropropan-2-ol (HFIP) was found to be effective for the Bischler indole synthesisundermicrowaveirradiation in the absence of a metal catalyst. Under the catalysis of HFIP, a wide range of α-amino arylacetones were successfully transformed into indole derivatives with moderate to good yields.
Electrosynthesis of
<i>ortho</i>
‐Amino Aryl Ketones by Aerobic Electrooxidative Cleavage of the C(2)=C(3)/C(2)−N Bonds of
<i>N</i>
‐Boc Indoles
作者:Jintao Wu、Zehui Peng、Tong Shen、Zhong‐Quan Liu
DOI:10.1002/adsc.202200256
日期:2022.8.2
strategies for oxidativecleavage of 2,3-double bond of substituted indoles generally suffered from usage of heavy metals, stoichiometric chemical oxidants or hash conditions. Herein, we reported an electrochemistry-driven aerobiccleavage of C(2)=C(3)/C(2)−N bonds of indoles. Through an undivided cell, various indoles and its derivatives can be converted into the corresponding ortho-amino aryl ketones. This
An electro-oxidative intermolecular CSP2–H amination of heteroarenes via proton-coupled electron transfer is reported.
报告了通过质子耦合电子转移对杂环烯进行分子间 CSP2-H 氨化的电氧化作用。
PROCESS FOR PRODUCING INDOLINE COMPOUNDS AND INTERMEDIATES FOR THE PRODUCTION OF THE SAME
申请人:TOKYO TANABE COMPANY LIMITED
公开号:EP0810214A1
公开(公告)日:1997-12-03
This invention concerns a method for the production of a 3-arylindoline compound represented by the general formula
(wherein R1 represents an optionally substituted phenyl group or an aromatic heterocyclic group and R2 represents a hydrogen atom, a halogen atom, a lower alkyl group, a hydroxy group, a lower alkoxy group, a carbamoyl group, or a lower alkoxycarbonyl group) which is used for the production of a 1-acyl-3-arylindoline compound represented by the general formula
(wherein R1 and R2 have the same meanings as defined above and R3 represents the following group)
which is the 5-HT3 receptor antagonist, based on the fact that a 1-acyl-3-arylindole compound obtained by having a removable electron withdrawing group linked thereto by acylating the 1 position of a 3-arylindole compound with such an organic acid as carboxylic acid or sulfonic acid easily undergoes a catalytic reduction under neutral or acidic conditions and gives rise to a 1-acyl-3-arylindoline compound and that an optically active 1-acyl-3-arylindole compound obtained by the acylation with an organic acid such as optically active carboxylic acid or sulfonic acid produces an optically active 1-acyl-3-arylindoline compound with high selectivity by the reaction of a catalytic reduction.