Palladium-Catalyzed Ortho-Alkoxylation of <i>N</i>-Benzoyl α-Amino Acid Derivatives at Room Temperature
作者:Shuangjie Li、Wei Zhu、Feng Gao、Chunpu Li、Jiang Wang、Hong Liu
DOI:10.1021/acs.joc.6b02257
日期:2017.1.6
An efficient palladium-catalyzed ortho-alkoxylation of N-benzoyl α-amino acid derivatives at roomtemperature has been explored. This novel transformation, using amino acids as directing groups, Pd(OAc)2 as catalyst, alcohols as the alkoxylation reagents, and PhI(OAc)2 as the oxidant, showed wide generality, good functional tolerance, and high monoselectivity and regioselectivity.
Ni(<scp>ii</scp>)-catalyzed mono-selective <i>ortho</i>-arylation of unactivated aryl C–H bonds utilizing amino acids as a directing group
作者:Zhanqing Cong、Feng Gao、Hong Liu
DOI:10.1039/c9ra00749k
日期:——
The nickel(II)-catalyzed ortho-arylation of unactivated C–H bonds utilizing amino acids as directing groups with aryl iodides or bromides as coupling electrophiles is described. This protocol features excellent mono-selectivity, good regioselectivity, and wide functional group tolerance. Additionally, the obtained products bearing a biaryl motif and an amino acid represent bioactive molecules with
描述了镍 ( II ) 催化的未活化 C-H 键的邻位芳基化,利用氨基酸作为导向基团,芳基碘化物或溴化物作为偶联亲电体。该协议具有优异的单选择性、良好的区域选择性和广泛的官能团耐受性。此外,获得的带有联芳基基序和氨基酸的产物代表了具有广泛生物活性的生物活性分子。
Identification of non-peptidic cysteine reactive fragments as inhibitors of cysteine protease rhodesain
作者:Danielle McShan、Stefan Kathman、Brittiney Lowe、Ziyang Xu、Jennifer Zhan、Alexander Statsyuk、Ifedayo Victor Ogungbe
DOI:10.1016/j.bmcl.2015.08.074
日期:2015.10
Rhodesain, the major cathepsin L-like cysteine protease in the protozoan Trypanosoma brucei rhodesiense, the causative agent of African sleeping sickness, is a well-validated drug target. In this work, we used a fragment-based approach to identify inhibitors of this cysteine protease, and identified inhibitors of T. brucei. To discover inhibitors active against rhodesain and T. brucei, we screened a library of covalent fragments against rhodesain and conducted preliminary SAR studies. We envision that in vitro enzymatic assays will further expand the use of the covalent tethering method, a simple fragment-based drug discovery technique to discover covalent drug leads. (C) 2015 Elsevier Ltd. All rights reserved.
Cu(Ⅱ)-promoted oxidative C-N bond cleavage of N-benzoylamino acids to primary aryl amides
作者:Liandi Zhou、Wei Liu、Yongli Zhao、Junmin Chen
DOI:10.24820/ark.5550190.p009.726
日期:——
oxidative C-N bond cleavage of N-benzoyl amino acids was developed. It is the first example of using accessible amino acid as an ammonia synthetic equivalent for the synthesis of primary aryl amides via CuCl2-promoted oxidative C-N bond cleavage reaction. The present protocol shows excellent functional group tolerance and provides an alternative method for the synthetic of primary aryl amides in 84-96% yields