C–H Borylation of Diphenylamines through Adamantane-1-carbonyl Auxiliary by BBr3
摘要:
A method for ortho-C-H borylation of diphenylamines using BBr3 as the boron source has been reported. The noncatalytic adamantane-1-carbonyl directed reaction exhibited site exclusivity and good functional group tolerance. Generally, the borylation occurred at the more electron-rich aromatic ring and the borylated products could be converted to various useful intermediates. Besides, the derived arylation and removal of auxiliary of the product could be achieved in a one-pot fashion.
C–H Borylation of Diphenylamines through Adamantane-1-carbonyl Auxiliary by BBr3
摘要:
A method for ortho-C-H borylation of diphenylamines using BBr3 as the boron source has been reported. The noncatalytic adamantane-1-carbonyl directed reaction exhibited site exclusivity and good functional group tolerance. Generally, the borylation occurred at the more electron-rich aromatic ring and the borylated products could be converted to various useful intermediates. Besides, the derived arylation and removal of auxiliary of the product could be achieved in a one-pot fashion.
Palladium-Catalyzed [3+3] Annulation between Diarylamines and α,β-Unsaturated Acids through CH Activation: Direct Access to 4-Substituted 2-Quinolinones
作者:Rajesh Kancherla、Togati Naveen、Debabrata Maiti
DOI:10.1002/chem.201500774
日期:2015.6.1
A CHactivation strategy has been successfully employed for the high‐yielding synthesis of a diverse array of 4‐substituted2‐quinolinone species by a palladium‐catalyzed dehydrogenative coupling involving diarylamines. This intermolecular annulation approach incorporates readily available α,β‐unsaturated carboxylic acids as the couplingpartner by suppressing the facile decarboxylation. Based on
AC ħ激活策略已被成功地用于通过涉及二芳基胺钯催化脱氢偶联高产合成4-取代的2-喹啉酮物种的多样性阵列的。这种分子间环化方法通过抑制容易的脱羧作用,结合了易于获得的α,β-不饱和羧酸作为偶联伴侣。在初步的机理研究的基础上,提出了一个反应顺序,包括邻,π-配位,β-迁移插入和β-氢化物消除。
Divergent Reactivity in Palladium-Catalyzed Annulation with Diarylamines and α,β-Unsaturated Acids: Direct Access to Substituted 2-Quinolinones and Indoles
作者:Rajesh Kancherla、Togati Naveen、Debabrata Maiti
DOI:10.1002/chem.201501208
日期:2015.6.8
A palladium‐catalyzedCH activation strategy has been successfully employed for exclusive synthesis of a variety of 3‐substituted indoles. A [3+3] annulation for synthesizing substituted 2‐quinolinones was recently developed by reaction of α,β‐unsaturated carboxylic acids with diarylamines under acidic conditions. In the present work, an analogous [3+2] annulation is achieved from the same set of
Well-Defined Copper(I) Amido Complex and Aryl Iodides Reacting to Form Aryl Amines
作者:Samuel A. Delp、Laurel A. Goj、Mark J. Pouy、Colleen Munro-Leighton、John P. Lee、T. Brent Gunnoe、Thomas R. Cundari、Jeffrey L. Petersen
DOI:10.1021/om101084e
日期:2011.1.10
The CuI complex (IPr)Cu(NHPh) IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene} reacts with aryl iodides to form diaryl amine products and (IPr)Cu(I), which was confirmed by independent synthesis and characterization. For the reaction with iodobenzene, the products are diphenylamine and aniline. Protection of the hydrogen para to the iodo functionality with ortho-methyl groups results in quantitative
Cu I络合物(IPr)Cu(NHPh)IPr = 1,3-双(2,6-二异丙基苯基)咪唑-2-亚烷基}与芳基碘化物反应形成二芳基胺产物和(IPr)Cu(I),独立的合成和表征证实了这一点。为了与碘苯反应,产物是二苯胺和苯胺。用邻甲基将对氢对碘官能团的保护导致定量转化为二芳基胺。结合计算和实验研究表明,CN键的形成最有可能是通过氧化加成/还原消除序列发生的。