Electrochemical Selenation/Cyclization of Quinones: A Rapid, Green and Efficient Access to Functionalized Trypanocidal and Antitumor Compounds
作者:Ammar Kharma、Claus Jacob、Ícaro A. O. Bozzi、Guilherme A. M. Jardim、Antonio L. Braga、Kelly Salomão、Claudia C. Gatto、Maria Francilene S. Silva、Claudia Pessoa、Maximilian Stangier、Lutz Ackermann、Eufrânio N. da Silva Júnior
DOI:10.1002/ejoc.202000216
日期:2020.8.9
Electrochemicalselenation in undivided electrochemical cells allows the preparation of selenium‐containing naphthoquinones with potent bioactivity. The rapid, green and efficient protocol avoids chemical oxidants and enables the synthesis of target molecules in a fast and reliable way.
Pd-catalyzed regioselective hydroesterification of 3-allyl-2-hydroxynaphthoquinones: Easy access to linear or branched naphthoquinone esters
作者:Julian A. Enciso-Vargas、G. Alejandra Suárez-Ortiz、Manuel Amézquita-Valencia
DOI:10.1016/j.ica.2024.121928
日期:2024.4
The successful hydroesterification of 3-allyl-2-hydroxynapthoquinones is presented, providing excellent regioselectivity of the linear and branched esters. The Pd(OAc)2/dppf catalytic system was used to prepare a series of linear naphthoquinone esters with high regioselectivity. A slight modification of the initial conditions afforded branched esters with high regioselectivity using a PdCl2/dppe combination