Metal-Free Synthesis of <i>N</i>-Aryl-Substituted Azacycles from Cyclic Ethers Using POCl<sub>3</sub>
作者:Minh Thanh La、Soosung Kang、Hee-Kwon Kim
DOI:10.1021/acs.joc.9b00377
日期:2019.6.7
A facile method for the synthesis of N-aryl-substituted azacycles from arylamines and cyclic ethers has been developed. In this study, arylamines were treated with cyclic ethers in the presence of POCl3 and DBU to provide five- and six-membered azacycles. Using this method, various azacycloalkanes, isoindolines, and tetrahydroisoquinolines were prepared in high yields. This synthetic method offers
Diethylsilane exhibits remarkable reactivity relative to typical hydrosilanes in the reduction of carbonyl compounds, imines, and amides catalyzed by Au nanoparticles.
Iron‐Catalysed Switchable Synthesis of Pyrrolidines
<i>vs</i>
Pyrrolidinones by Reductive Amination of Levulinic Acid Derivatives
<i>via</i>
Hydrosilylation
作者:Duo Wei、Chakkrit Netkaew、Christophe Darcel
DOI:10.1002/adsc.201801656
日期:2019.4.16
A selective production of pyrrolidines vs pyrrolidinones via hydrosilylation of levulinic acid and levulinates by switching of the iron complex catalyst is presented herein. The reactions proceeded efficiently with various anilines and alkylamines under both visible light irradiation and thermal conditions with 43 examples in isolated yields up to 93%. Noticeably, under similar conditions, cyclic amines
Practical direct synthesis of <i>N</i>-aryl-substituted azacycles from <i>N</i>-alkyl protected arylamines using TiCl<sub>4</sub> and DBU
作者:Van Hieu Tran、Minh Thanh La、Soosung Kang、Hee-Kwon Kim
DOI:10.1039/d0ob00880j
日期:——
A noveltransformation of N-alkyl protected arylamines and cyclic ethers into N-aryl substituted azacycles is described. Alkyl groups have been used for the protection of amines in organic syntheses. In this synthesis, N-alkyl protected arylamines were reacted with cyclic ethers in the presence of TiCl4 and DBU, crucial reagents affording five- and six-membered azacycles. In particular, utilization
Synthesis of N-aryl substituted, five- and six-membered azacycles using aluminum-amide complexes
作者:Balaji L. Korbad、Sang-Hyeup Lee
DOI:10.1039/c4cc04111a
日期:——
Synthesis of N-arylsubstituted, five- and six-membered azacycloalkanes, isoindolines and tetrahydroisoquinolines, has been described. In this synthesis, cyclic ethers (n = 1, 2) were treated with dimethylaluminum-amide reagents, derived from a range of aryl amines and trimethylaluminum, to afford the corresponding azacycles in good yields.