annulation of readily available benzoicacids and alkynes is reported for the first time. The carboxylate group acts as both a directing group and an internal nucleophilic reagent to facilitate a C(sp2)–H vinylation/annulation cascade. This reaction avoids the classically oxidative [4+2] annulation, allowing the efficient synthesis of a wide array of eight-membered lactones under oxidant-free conditions
Bimetallic nanosized solids with acid and redox properties for catalytic activation of C–C and C–H bonds
作者:Jose R. Cabrero-Antonino、María Tejeda-Serrano、Manuel Quesada、Jose A. Vidal-Moya、Antonio Leyva-Pérez、Avelino Corma
DOI:10.1039/c6sc03335k
日期:——
A new approach is presented to form self-supported bimetallic nanosized solids with acid and redox catalyticproperties. They are water-, air- and H2-stable, and are able to activate demanding C–C and C–H reactions. A detailed mechanistic study on the formation of the Ag–Fe bimetallic system shows that a rapid redox-coupled sequence between Ag+, O2 (air) and Fe2+ occurs, giving monodisperse Ag nanoparticles
提出了一种形成具有酸和氧化还原催化特性的自支撑双金属纳米固体的新方法。它们对水、空气和 H 2稳定,并且能够激活要求苛刻的 C–C 和 C–H 反应。对 Ag-Fe 双金属体系形成的详细机理研究表明,Ag +、O 2(空气)和 Fe 2+之间发生快速氧化还原耦合序列,产生由 O 桥联双原子 Fe 3+支撑的单分散 Ag 纳米粒子三氟甲酰亚胺。该系统可以扩展到嵌入 Cu 2+、Bi 3+和 Yb 3+三氟甲酰亚胺基质中的银纳米颗粒。
Synthesis of the <i>ortho</i>/<i>meta</i>/<i>para</i> Isomers of Relevant Pharmaceutical Compounds by Coupling a Sonogashira Reaction with a Regioselective Hydration
作者:Antonio Leyva-Pérez、Jose R. Cabrero-Antonino、Paula Rubio-Marqués、Saud I. Al-Resayes、Avelino Corma
DOI:10.1021/cs401075z
日期:2014.3.7
Aryl ketones substituted in ortho, meta, and para position are prepared by a palladium-catalyzed Sonogashira reaction followed by a regioselective hydration of the so-formed alkyne with triflimidic acid or a gold catalyst, under catalytic conditions. This methodology opens a way to obtain substituted aryl alkyl ketones from readily available starting materials, haloarenes, and terminal alkynes. The
The invention relates to particular substituted heterocycle fused gamma-carbolines, their prodrugs, in free, solid, pharmaceutically acceptable salt and/or substantially pure form as described herein, pharmaceutical compositions thereof, and methods of use in the treatment of diseases involving 5-HT2A receptor, serotonin transporter (SERT) and/or pathways involving dopamine D1/D2 receptor signaling systems, and/or the treatment of residual symptoms.