Attribution de toutes les constantes de couplage hyperfin des protons isotropes sur la base d'une 构象 ap,ap pour les radicaux anioniques (E)-dimethyl-2,2' et E-tetramethyl-2,2',5,5'-芪。构象的讨论
series of arylmethanesulfonyl chlorides were treated with triethylamine in THF to give stilbenes in excellent yields. Workup of the mixtures below 10 °C permits isolation of stilbene episulfones which on warming decompose to yield the corresponding stilbenes stereospecifically. Application of the reaction to 9-fluorenylsulfonyl chloride affords bifluorenylidene, while trans-styrylmethanesulfonyl chloride
A Novel Catalyst-Free Synthesis of 2,2-Diaryl Enamides from Stilbenes via a Nitrene Transfer Reaction
作者:Yuanyuan Zhang、Wenjing Ye、Hui Zhang、Xiao Xiao
DOI:10.1002/ejoc.201900885
日期:2019.9.8
An unexpected nitrene transfer from iminoiodinane to stilbene in absence of catalyst has been described, directly giving a series of 2,2‐diaryl enamides in 28–75 % yields. This reaction involved aziridination, ring‐opening of aziridine, and aromatic rearrangement, in which iminoiodinane played a dual role.
Attribution de toutes les constantes de couplage hyperfin des protons isotropes sur la base d'une conformation ap,ap pour les radicaux anioniques (E)-dimethyl-2,2' et E-tetramethyl-2,2',5,5'-stilbene. Discussion en fonction des conformations
Attribution de toutes les constantes de couplage hyperfin des protons isotropes sur la base d'une 构象 ap,ap pour les radicaux anioniques (E)-dimethyl-2,2' et E-tetramethyl-2,2',5,5'-芪。构象的讨论