Enecarboxylation with diethyl oxomalonate as an enophilic equivalent of carbon dioxide. A synthesis of allylcarboxylic acids
作者:Mary F. Salomon、Simon N. Pardo、Robert G. Salomon
DOI:10.1021/ja00325a014
日期:1984.6
On prepare une serie d'acides carboxyliques allyliques a partir des olefines correspondantes par un processus en deux etapes equivalent a: 1) une reaction ene avec l'oxomalonate de diethyle conduisant a l'ester α-hydroxymalonique; 2) une bisdecarboxylation oxydante de ce dernier
在制备 une serie d'acides carboxyliques allyliques a partir des ocoxyliques par un processus en deux etapes 等价物 a: 1) une 反应 ene avec l'oxomalonate de diethyle conduisant a l'ester α-hydroxymalonique; 2) une bisdecarboxylation oxydante de ce dernier
Highly selective hydrogenation of multiple carbon–carbon bonds promoted by nickel(0) nanoparticles
作者:Francisco Alonso、Iñaki Osante、Miguel Yus
DOI:10.1016/j.tet.2006.10.043
日期:2007.1
A new method for the highlystereoselective cis semihydrogenation of internal alkynes, semihydrogenation of terminal alkynes, reduction of dienes to alkenes, and reduction of alkynes and alkenes to alkanes is described based on in situ generated both Ni(0) nanoparticles and molecular hydrogen.
Saturation kinetics and relative reactivity of the double bonds of alicyclic dienes in their hydrogenation
作者:N. V. Vereshchagina、T. N. Antonova、G. Yu. Kopushkina、I. G. Abramov
DOI:10.1134/s0023158417030120
日期:2017.5
The kinetics of the liquid-phase hydrogenation of cyclodienes with various structures (endo-tricyclo[ 5.2.1.02,6]decadiene-3,8 and cis,cis-1,5-cyclooctadiene) by hydrogen over a finely dispersed 1%Pd/C catalyst at atmospheric pressure has been studied. The catalyst provides the possibility for successive saturation of the double bonds of the dienes. The reactivities of the cyclodienes determined by
Enantio‐ and Diastereoselective Suzuki–Miyaura Coupling with Racemic Bicycles
作者:F. Wieland Goetzke、Mike Mortimore、Stephen P. Fletcher
DOI:10.1002/anie.201906478
日期:2019.8.26
Herein, we describe a rhodium‐catalyzed enantio‐ and diastereoselective Suzuki–Miyaura cross‐coupling between racemic fused bicyclic allylic chlorides and boronic acids. The highly stereoselective transformation allows for the coupling of aryl, heteroaryl, and alkenyl boronic acids and gives access to functionalized bicyclic cyclopentenes, which can be converted into other five‐membered‐ring scaffolds
spiro[bicyclo[2.2.1]heptane-2,1′-cyclobutan]-3-one (21) and the related tosylates (28, 32) rearranged, in part, to afford derivatives of spiro[bicyclo[2.2.1]heptane-7,1′-cyclobutane] (29, 33, 34). In both series, ring expansion of the spiroannellated cyclobutane, by exo-3,2-C shift, was the major reaction, giving rise to a uniquely endo-selective tertiary cation (36). Analogously positioned cyclopropane rings remain