使用由KO t Bu,BuLi和2,2,6,6,-四甲基哌啶(TMP(H ))。KO t的混合庚烷中的Bu,BuLi和TMP(H)给出了一种基础混合物的溶液,当用于氘标记实验时,证实了这三种试剂组分对反应性和选择性的要求。该反应方案在操作上简单明了,并且发现可适用于多种底物。在生成金属化产物时,它们在庚烷中于环境温度下以多种合成上有用的方式反应。所示实例包括苄基三甲基硅烷和α,α-双(三甲基甲硅烷基)甲苯试剂的产生,它们是用于亲核加成和彼得森烯化反应的苄基阴离子和α-甲硅烷基碳负离子的替身稳定替代物。由1,2-二溴乙烷介导的直接C-C偶联提供了联苄和[2.2]甲基环已烷的入口。
We have investigated the reductive cleavage of arylalkyl methylethers with an excess of lithium metal and a catalytic amount of naphthalene. The reaction proceeds regioselectively in the presence of various substituents on the aromatic ring, allowing access to a wide array of arylalkyl lithium derivatives, some of which are not easily accessible by conventional methods.
Controlled Anion Migrations with a Mixed Metal Li/K-TMP Amide: General Application to Benzylic Metalations
作者:Patricia Fleming、Donal F. O’Shea
DOI:10.1021/ja110234v
日期:2011.2.16
A general method is described for benzylic metalation of o-, m-, and p-substituted toluenes using a mixed metal amide base generated from BuLi/KOtBu/TMP at -78 degrees C in THF. The excellent selectivity achieved can be rationalized by the ability of the mixed metal amide base to facilitate an anion migration from the kinetic (o-aryl) to the benzylic metalation site. Remarkably, this controlled anion migration is achievable with catalytic amounts of TMP at -78 degrees C.
Novel aryloxyphenyl-propanamines
申请人:Tung Roger
公开号:US20070032555A1
公开(公告)日:2007-02-08
The present invention relates to a non-radioactive, heavy-atom isotopologue of Compound 1 containing one or more deuterium in place of a hydrogen covalently bound to carbon. The Compound 1 isotopologues of the invention are inhibitors of norepinephrine uptake and possess unique biopharmaceutical and pharmacokinetic properties compared to the corresponding non-isotope containing compounds. They may also be used to accurately determine the concentration of Compound 1 in biological fluids. The invention further provides compositions comprising these heavy-atom Compound 1 isotopologue and methods of treating diseases and conditions linked to reduced neurotransmission of norepinephrine.