Cu-Catalyzed Sequential Dehydrogenation–Conjugate Addition for β-Functionalization of Saturated Ketones: Scope and Mechanism
作者:Xiaoming Jie、Yaping Shang、Xiaofeng Zhang、Weiping Su
DOI:10.1021/jacs.6b01337
日期:2016.5.4
The first copper-catalyzed direct β-functionalization of saturatedketones is reported. This protocol enables diverse ketones to couple with a wide range of nitrogen, oxygen and carbon nucleophiles in generally good yields under operationally simple conditions. The detailed mechanistic studies including kinetic studies, KIE measurements, identification of reaction intermediates, EPR and UV-visible
Iodine-catalyzed coupling of β-hydroxyketones with aromatic amines to form β-aminoketones and Benzo[h]quinolones
作者:Changqing Miao、Liya Jiang、Lanhui Ren、Qingxia Xue、Fang Yan、Weiwei Shi、Xinjian Li、Jiwen Sheng、Shuangshuang Kai
DOI:10.1016/j.tet.2019.02.041
日期:2019.4
β-unsaturated ketone intermediates and aza-Michael addition were not involved in this coupling reaction which made it unique when compared to otherreactions reported in literature. Inexpensive iodine catalyst, easy accessible raw materials, mild reactionconditions, good functional group tolerance and excellent selectivity made this coupling reaction be a practical method. This reaction can also be
已经开发出碘催化的β-羟基酮与芳香胺的偶联反应,以产生β-氨基酮和苯并[ h ]喹诺酮。贵金属催化剂,氧化剂,α,β-不饱和酮中间体和氮杂-迈克尔加成均不参与该偶联反应,因此与文献报道的其他反应相比,它具有独特性。廉价的碘催化剂,易于获得的原料,温和的反应条件,良好的官能团耐受性和出色的选择性使这种偶联反应成为一种实用的方法。该反应也可以扩大规模。
Synthesis of 3-Aroyl-4-hydroxy-4-arylpiperidine Derivatives by DBU-Catalyzed Reactions of Amines with Vinyl Ketones
In one-pot cascade reaction, a series of functionalized 3-aroyl-4-hydroxy-4-arylpiperidine derivatives were prepared from sulfonamides and vinyl ketones with good to excellent yields and diastereoselectivities. The reaction was catalyzed by the commercially available Lewis base 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) and could be easily manipulated under mild condition.
An operationally simple, inexpensive, efficient, and environmentally friendly protocol for the amineexchangereactions of 3-N,N-dimethylaminopropiophenone and N,N-dimethylaminomethylferrocene with primary aryl amines is developed using the ionic liquid [bmim]PF 6 as a solvent. The recovered ionic liquid can be reused for several cycles with constant activity.
Trifluoromethanesulfonic acid catalyzed Friedel–Crafts acylation of aromatics with β-lactams
作者:Kevin W. Anderson、Jetze J. Tepe
DOI:10.1016/s0040-4020(02)01026-8
日期:2002.10
N-Protected and unprotected 2-azetidinones, protolytically activated by superacidic trifluoromethanesulfonic acid, react with aromaticcompounds to give β-amino aromatic ketones in good to excellent yields (65–98%). Non-benzenoidaromatics (pyrrole and ferrocene) produced good yield (64–89%) of the corresponding ketones.