Synthesis of 2‐ and 2,7‐Functionalized Pyrene Derivatives: An Application of Selective CH Borylation
作者:Andrew G. Crawford、Zhiqiang Liu、Ibraheem A. I. Mkhalid、Marie‐Hélène Thibault、Nicolle Schwarz、Gilles Alcaraz、Andreas Steffen、Jonathan C. Collings、Andrei S. Batsanov、Judith A. K. Howard、Todd B. Marder
DOI:10.1002/chem.201103774
日期:2012.4.16
7‐bis(R)‐pyrenes with R=BF3K (3), Br (4), OH (5), B(OH)2 (6), and OTf (7). Using these nominally nucleophilic and electrophilic derivatives as coupling partners in Suzuki–Miyaura, Sonogashira, and Buchwald–Hartwig cross‐coupling reactions, we obtained 2,7‐bis(R)‐pyrenes with R=(4‐CO2C8H17)C6H4 (8), Ph (9), C≡CPh (10), C≡C[4‐B(Mes)2}C6H4] (11), C≡CTMS (12), C≡C[(4‐NMe2)C6H4] (14), C≡CH (15), N(Ph)[(4‐OMe)C6H4]
描述了一种有效的合成路线,可以合成2和7,7-取代的pyr。区域专一直接Ç 芘h的硼基化与铱基催化剂,通过的反应在原位制备的[的Ir(μ-OME)鳕鱼} 2 ](COD = 1,5-环辛二烯)与4,4'-二-叔丁基-2,2'-二吡啶,给出2,7-双(BPIN)芘(1)和2-(BPIN)芘(2,销= OCME 2 CME 2 O)。从1开始,通过简单的衍生化策略,我们合成了R = BF 3 K(3),Br(4),OH(5),B(OH)2(6)和OTf(7)。使用这些名义上的亲核和亲电子衍生物作为铃木-宫浦,Sonogashira和布赫瓦尔德-哈特维格交叉偶联反应中的偶联伙伴,我们得到了R =(4-CO 2 C 8 H 17的2,7-bis(R)-吡咯)C 6 H 4(8),Ph(9),C≡CPh(10),C≡C[4-B(Mes)2 } C 6 H 4 ](11),C≡CTMS(12),