作者:Steven M. Allin、William R.S. Barton、W. Russell Bowman、Emma Bridge (née Mann)、Mark R.J. Elsegood、Tom McInally、Vickie McKee
DOI:10.1016/j.tet.2008.06.014
日期:2008.8
Alkyl radicals have been cyclised onto pyrroles, imidazoles and pyrazoles, and acyl radicals cyclised onto pyrroles, using Bu3SnH-, (TMS)3SiH- and Bu3GeH-mediated aromatic homolytic substitution for the synthesis of bicyclic N-heterocycles. The reactions yield intermediate π-radicals that lose hydrogen in the rearomatisation step of the aromatic homolytic substitution. Mechanistic studies of these
Total Synthesis of (−)-Hanishin, (−)-Longamide B, and (−)-Longamide B Methyl Ester <i>via</i> a Novel Preparation of <i>N</i>-Substituted Pyrrole-2-Carboxylates
作者:Guolin Cheng、Xinyan Wang、Hailin Bao、Chuanjie Cheng、Nan Liu、Yuefei Hu
DOI:10.1021/ol300495m
日期:2012.4.6
Page 1062. The word “longamide” was mis-spelled as “longmide” in the title, throughout the paper, including text and graphics, as well as the Supporting Information file. This article has not yet been cited by other publications.
Palladium-Catalyzed Direct CH Alkylation of Electron-Deficient Pyrrole Derivatives
作者:Lei Jiao、Thorsten Bach
DOI:10.1002/anie.201301154
日期:2013.6.3
What looks like a Friedel–Crafts alkylation reaction of electron‐deficient pyrroles is actually a PdII‐catalyzed, norbornene‐mediated CH activation reaction, in which the alkylation of the pyrrole core occurs by reductive elimination. As well as ethyl‐1H‐pyrrole‐2‐carboxylate (see scheme), several other 2,3‐disubstituted pyrroles underwent the selective C5 alkylation in good yield.
表观和实际:什么样子缺电子吡咯弗里德尔-克拉夫茨烷基化反应实际上是钯II催化的,降冰片烯体介导C ħ活化反应,其中,所述吡咯核的烷基化通过还原消除发生。除1 H H-吡咯2-羧酸乙酯(参见方案)外,其他几种2,3-二取代的吡咯也进行了选择性C5烷基化,收率很高。