was devised for spiroannulation of oxindoles with ortho-bromoaryl ynones, β-bromoalkenyl ynones, and β-bromoalkenyl enones in a convenient and efficient manner. As an application, a short synthesis of tetracyclic alkaloid spindomycin B was accomplished.
Nitromethane as a Carbanion Source for Domino Benzoannulation with Ynones: One‐Pot Synthesis of Polyfunctional Naphthalenes and a Total Synthesis of Macarpine
applicability has been devised for the regioselective synthesis of polyfunctional naphthalenes by employing nitromethane and ortho‐haloaryl ynones. Utilization of nitromethane as a one carbon carbanion source that is incorporated into a variety of ynones, ends up as an aromatic nitro substituent. The application of this domino process towards a total synthesis of the polycyclic alkaloid macarpine demonstrate
的单釜,过渡金属-自由,多米诺迈克尔/ S Ñ普遍适用性的Ar协议已经通过使用硝基甲烷和设计用于多官能萘的区域选择性合成邻-haloaryl ynones。硝基甲烷作为一种碳碳负离子源的使用,并被引入到各种炔酮中,最终以芳族硝基取代基的形式出现。该多米诺法在多环生物碱马卡平的全合成中的应用证明了该方法的有效性。在概念上是简单的方法来影响ynones显示广泛的底物范围和官能团耐受性,并已与被取代的硝基甲烷实现的区域选择性,多功能benzoannulation以及与脂环ö-单倍体。
Solvent-controlled divergent annulation of ynones and (iso)quinoline <i>N</i>-oxides: of 3-((iso)quinolin-1-yl)-4<i>H</i>-chromen-4-ones and 13<i>H</i>-isoquinolino[2,1-<i>a</i>]quinolin-13-ones
An effective annulation of ynones and (iso)quinoline N-oxides was developed to divergently prepare 3-((iso)quinolin-1-yl)-4H-chromen-4-ones and 13H-isoquinolino[2,1-a]quinolin-13-ones under transition-metal-free conditions.
Pd-Catalyzed Asymmetric Amination of Enamines: Expedient Synthesis of Structurally Diverse N–C Atropisomers
作者:Peng Zhang、Chang-Qiu Guo、Wang Yao、Chuan-Jun Lu、Yingzi Li、Robert S. Paton、Ren-Rong Liu
DOI:10.1021/acscatal.3c00732
日期:2023.6.2
The transition-metal-catalyzed cross-coupling of enamines is an attractive method for producing compounds with an N–C chiral axis; however, it faces considerable challenges that remain unresolved. Herein, a palladium-catalyzed amination method was developed to construct structurally diverse five–six biaryl and six–six nonbiaryl N–C atropisomers. The reaction mechanism was explained using density functional
Palladium-Catalyzed Tandem Amination Reaction for the Synthesis of 4-Quinolones
作者:Tiankun Zhao、Bin Xu
DOI:10.1021/ol902626d
日期:2010.1.15
An efficient palladium-catalyzed tandem amination approach was developed In one step to afford functionalized 4-quinolones In good to excellent yields from easily accessible o-haloaryl acetylenic ketones and primary amines.