Copper-Mediated Synthesis of N-Acyl Vinylogous Carbamic Acids and Derivatives: Synthesis of the Antibiotic CJ-15,801
摘要:
Copper(I)-mediated C-N bond formation has been employed to prepare both N-acyl vinylogous carbamic acids and ureas. The novel N-acyl vinylogous carbamic acid antibiotic, CJ-15,801, was synthesized using this methodology.
我们报道了一种 Ni 催化的炔烃与烯基卤化物和氟代烷基卤化物的三组分交叉亲电偶联,以生成掺有氟代烷基的 1,3-二烯。这种温和且操作简单的协议以其广泛的底物范围和出色的化学、区域和立体选择性而著称,为构建含氟烷基的二烯基序提供了一个新的无有机金属试剂平台。已经进行了初步的机理研究以探索潜在的反应途径。
(<i>Z</i>)-Oxopropene-1,3-diyl, a Linker for the Conjugation of the Thiol Group of Cysteine with Amino-Derivatized Drugs
作者:Elena Petit、Lluís Bosch、Anna M. Costa、Jaume Vilarrasa
DOI:10.1021/acs.joc.8b02686
日期:2019.9.6
We have developed a conjugation reaction based on the thia-Michael addition to activated triple bonds, which can be an alternative to maleimides, the most commonly used reagents to link thiol groups (of Cys) to drugs and labels. An amino group is converted into its propynamide and, in aqueous media at 37 °C and pH 7.4, Cys derivatives are added. The oxopropene-1,3-diyl linker is formed with excellent