治疗容易得到ñ -炔基-5-碘-6-磺氨基-嘧啶与我PrMgCl⋅LiCl随后用CuCN⋅2的LiCl一个转移金属化产生,分子内carbocupration后,金属化的吡啶- [R ROLO [2,3- d ]嘧啶。这些嘧啶与烯丙基卤化物或酰氯的猝灭反应会产生多官能吡咯并[2,3- d ]嘧啶。与ICl的进一步反应和使用PEPPSI- i Pr作为催化剂的Negishi交叉偶联提供了完全取代的N-杂环。已经完成了海洋生物碱刚性蛋白A的正式合成,以及与天然激素5-羟色胺有关的7-氮杂鸟嘌呤衍生物的制备。
Regioselective I/Zn-exchange reactions were performed on polyiodinated arenes or heterocycles within 20 minutes at 0–25 °C using the bimetallic combination pTol2Zn·2LiOR [R = (CH2)2N(Me)(CH2)2NMe2] in toluene. The resulting diaryl- or diheteroarylzincs reacted well with allylic bromides and acyl chlorides to provide functionalized (hetero)aryl iodides in good yields.
direct chemo- and regioselective zinc insertions is described. The insertion of commercially available zinc dust into C-I and C-Br bonds, in the presence of LiCl, proceeded under mild reaction conditions. The reactions of the resulting organozincreagents with electrophiles gave the expected products in good yields. This procedure represents a new method for the polyfunctionalization of uracil derivatives
Preparation of Functionalized Organomanganese(II) Reagents by Direct Insertion of Manganese to Aromatic and Benzylic Halides
作者:Zhihua Peng、Paul Knochel
DOI:10.1021/ol201109g
日期:2011.6.17
arylmanganese compounds were prepared using commercial manganese powder in the presence of LiCl and catalyticamounts of both 2.5% InCl3 and 2.5% PbCl2 (THF, 0–50 °C). In addition, benzylic manganese reagents are obtained at 25 °C in ca. 70–80% yield (in the absence of LiCl) using commercial manganese powder and catalyticamounts of 2.5% InCl3 and 2.5% PbCl2. The resulting organomanganese reagents undergo