High Temperature Metalation of Functionalized Aromatics and Heteroaromatics using (tmp)<sub>2</sub>Zn·2MgCl<sub>2</sub>·2LiCl and Microwave Irradiation
作者:Stefan Wunderlich、Paul Knochel
DOI:10.1021/ol802118e
日期:2008.10.16
heteroaryl zinc reagents were efficiently prepared in THF via direct zincation using (tmp)2Zn x 2MgCl2 x 2LiCl and microwave irradiation. Ester and cyano functions as well as ketones are compatible with the high temperatures of the zincation. The resulting bis-organo zinc species undergo a number of subsequent reactions leading to highly functionalized aromatics and heteroaromatics in good to excellent yields
通过使用(tmp)2Zn x 2 MgCl2 x 2 LiCl进行直接锌化和微波辐射,可以在THF中有效地制备各种多官能芳基和杂芳基锌试剂。酯和氰基官能团以及酮与锌的高温相容。所得的双有机锌物质进行了许多后续反应,从而以良好或优异的收率得到高度官能化的芳族化合物和杂芳族化合物。
Direct Zincation of Functionalized Aromatics and Heterocycles by Using a Magnesium Base in the Presence of ZnCl<sub>2</sub>
作者:Zhibing Dong、Giuliano C. Clososki、Stefan H. Wunderlich、Andreas Unsinn、Jinshan Li、Paul Knochel
DOI:10.1002/chem.200801558
日期:2009.1.2
A wide range of polyfunctional aryl and heteroaryl zinc reagents were efficiently prepared in THF by using (TMP)2Mg⋅2 LiCl (TMP=2,2,6,6‐tetramethylpiperamidyl) in the presence of ZnCl2. The possible pathways of this metalation procedure as well as possible reactive intermediates are discussed. This experimental protocol expands the tolerance of functional groups and allows an efficient zincation of
[DE] BISAMID-ZINKBASEN<br/>[EN] BISAMIDE-ZINC BASES<br/>[FR] BASES DE BISAMIDE-ZINC
申请人:UNIV MUENCHEN L MAXIMILIANS
公开号:WO2008138946A1
公开(公告)日:2008-11-20
[EN] The invention relates to zinc amide bases of general formula (R1R2N)2-Zn aMgX1 [FR] L'invention concerne des bases de zinc-amide, de formule générale (R1R2N)2-Zn aMgX1 [DE] Die vorliegende Erfindung betrifft Zinkamid-Basen der allgemeinen Formel (R1R2N)2-Zn aMgX1
An efficient and mild ortho-zincation of aromatics and heterocycles by using TMP2Mg·2LiCl in the presence of ZnCl2
作者:Zhi-Bing Dong、Wei-Hua Zhu、Zhi-Guang Zhang、Min-Zhi Li
DOI:10.1016/j.jorganchem.2009.12.016
日期:2010.3
A variety range of functionalized aryl and heteroaryl zinc reagents were efficiently generated by using TMP2Mg center dot 2LiCl (TMP = 2,2,6,6-tetramethylpiperamidyl) in the presence of ZnCl2. The subsequently functionalization gave after reaction with electrophiles the expected polyfunctionalized products in good yields. A detailed study concerned on the point how we found the protocol and how we optimized it was depicted. (C) 2009 Elsevier B.V. All rights reserved.