A Copper‐Catalyzed, pH‐Neutral Construction of High‐Enantiopurity Peptidyl Ketones from Peptidic
<i>S</i>
‐Acylthiosalicylamides in Air at Room Temperature
作者:Lanny S. Liebeskind、Hao Yang、Hao Li
DOI:10.1002/anie.200804524
日期:2009.2.9
A copper‐catalyzed transformation of peptidic thiol esters and boronic acids gives peptidylketones and takes place in DMF or DMF/H2O at roomtemperature in air (see scheme). This aerobic reaction only occurs at a thiol ester group capable of coordinating to Cu through its appendage on the sulfur center and is not hampered by racemization of the reactants or products.
肽硫羟酸酯和硼酸的铜催化转化产生肽基酮,并在室温空气中的 DMF 或 DMF/H 2 O 中发生(参见方案)。这种需氧反应仅发生在能够通过硫中心上的附属物与Cu配位的硫羟酸酯基团处,并且不受反应物或产物的外消旋作用的阻碍。
Relation between Intramolecular NH···S Hydrogen Bonds and Coordination Number in Mercury(II) Complexes with Carbamoylbenzenethiol Derivatives
have intramolecularNH...Shydrogen bonds between the amide NH group and the sulfur atom coordinated to mercury, whereas the tetrakis(thiophenolato)mercury complex 5 does have an intramolecularNH...Shydrogenbond. A relatively weak NH...Shydrogenbond in 5 can be seen in the 1H NMR spectra and the IR spectra in chloroform and in the solid state. The 199Hg NMR spectra in bis(carbamoylthiophenolato)mercury
Copper-Catalyzed Intramolecular N–S Bond Formation by Oxidative Dehydrogenative Cyclization
作者:Zhen Wang、Yoichiro Kuninobu、Motomu Kanai
DOI:10.1021/jo401056g
日期:2013.7.19
Copper-catalyzed synthesis of benzo[d]isothiazol-3(2H)-ones and N-acyl-benzothiazetidine by intramolecular dehydrogenative cyclization is described. In this reaction, a new nitrogen–sulfur (N–S) bond is formed by N–H/S–H coupling. The present reaction has high functional group tolerance and gives products in gram scale. This method promotes double cyclization, allowing for synthesis of a drug intermediate
描述了铜通过分子内脱氢环化反应合成苯并[ d ]异噻唑-3(2 H)-酮和N-酰基-苯并噻唑烷的方法。在该反应中,通过NH / S-H偶联形成一个新的氮-硫(NS)键。本反应具有较高的官能团耐受性,并得到以克为单位的产物。该方法促进了双环化,从而允许合成药物中间体。
Synthesis of 1,2-Benzisothiazolin-3-one by Transamination of Sulfenamides
N-Substituted sulfenamoylbenzoates were synthesized by transamination of N-unsubstituted sulfenamoylbenzoates with amines. The reaction did not always proceed by simple amine exchange between the amines and ammonia on thesulfur atom of the sulfenamides. In reactions with aliphatic amines, the sulfenamides cyclized to form N-substituted1,2-benzisothiazolin-3-ones. The synthesis of 1,2-benzisothiazolin-3-ones