RhCl3·3H2O-Catalyzed C7-Selective C–H Carbonylation of Indolines with CO and Alcohols
摘要:
An attractive method for the synthesis of indoline-7-carboxylates through RhCl3-catalyzed C-H carbonylation of indolines with CO and alcohols was developed. The copper-based oxidant and removable pyrimidyl directing group played important roles in achieving high-level yields of the title products. Based on control experiments, a possible catalytic cycle was proposed.
An enantioselective alkoxycarbonylation-amination cascade process of terminalallenes with CO, methanol, and arylamines has been developed. It proceeds under mild conditions (room temperature, ambient pressure CO) via oxidative Pd(II) catalysis using an aromatic spiroketal-based diphosphine (SKP) as a chiral ligand and a Cu(II) salt as an oxidant and affords a wide range of α-methylene-β-arylamino
Cleavage of C–N bonds in guanidine derivatives and its relevance to efficient C–N bonds formation
作者:Denghu Chang、Dan Zhu、Peng Zou、Lei Shi
DOI:10.1016/j.tet.2015.01.050
日期:2015.3
nonenzymatic decomposition of guanidine derivatives with high structural and functional diversity into anilide products is achieved in the presence of PdII/Cu(II) carboxylates/CO, relying on a dual C–N bonds cleavage strategy. In this decomposition process, the cooperative action of PdII species, Cu(II) carboxylates, and CO provides not only the N-acylating agents but also an initiator to trigger this
在Pd II / Cu(II)羧酸盐/ CO的存在下,依靠双重C–N键裂解策略,可实现具有高结构和功能多样性的胍衍生物的高效非酶分解为苯胺产物。在这种分解过程中,Pd II物质,Cu(II)羧酸盐和CO的协同作用不仅提供N-酰化剂,而且还提供引发该C–N键裂解序列的引发剂。目前的结果表明,Pd II / Cu(II)羧酸盐/ CO系统为非反应性C–N单键的高选择性裂解提供了一种方便实用的方法。
Catalytic decomposition of diazo compounds by metal salts
作者:T. Shirafuji、Y. Yamamoto、H. Nozaki
DOI:10.1016/s0040-4020(01)91700-4
日期:——
in aq DMF catalyse thermal decomposition of diphenyldiazomethane 1 to afford benzopinacol dicarboxylates 2 in favourable yields. Chelate salts of CuII carboxylates such as salicylate, glycinate or tartrate accelerate thermolysis of 1 affording not 2 but tetraphenylethylene and beneophenone azine. These products are explained by assuming a copper carbenoid. The decomposition of 1 is catalysed also by
A dietary source of mineral in the form of a metal carboxylate is prepared using the acid-base-like reaction. A salt of a carboxylate anion and a by-product cation is reacted in aqueous solution with a salt of a metal cation and a by-product anion under conditions which form a metal carboxylate and the by-product salt. Solutions formed in the reaction may be applied directly to a dry carrier to produce a dry dietary supplement or, alternatively, the solutions may be filtered to remove precipitated by-product salt and the filtrate used as a liquid dietary supplement. Preferably, a reducing agent, such as ascorbic acid, is added to help prevent the oxidation of divalent to trivalent form of a metal salt, when an easily oxidized divalent metal is used as starting material.
Production and Characterization of a New Copper(II) Propanoate-Isonicotinamide Adduct Obtained via Slow Evaporation and using Supercritical CO<sub>2</sub> as an Antisolvent
作者:Isaac A. Cuadra、Francisco J. Martínez-Casado、José A. R. Cheda、M. I. Redondo、Concepción Pando、Albertina Cabañas
DOI:10.1021/acs.cgd.8b01034
日期:2019.2.6
A new adduct of isonicotinamide (INA) with copper(II) propanoate [Cu(C3)2] was prepared [Cu2(C3)4(INA)4] using two different methods. This type of compound shows high fungicidal activity. Solvent evaporation from ethanol rendered crystals suitable for single-crystal X-ray diffraction. Furthermore, a new semicontinuous method capable of simultaneous crystallization and micronization of the adduct using