氨基糖苷类抗生素模拟物的快速组合合成:在多组分缩合中使用聚乙二醇连接的胺和 Neamine 衍生的醛作为发现 HIV RNA Rev 响应元件的新抑制剂的策略
摘要:
使用新霉素衍生的醛、叔丁基异氰化物或异氰乙酸甲酯、甘氨酸缀合的聚乙二醇 (PEG) 甲基醚和各种 Cbz-N 保护的氨基酸,无需色谱法即可快速制备新霉素 B 模拟物文库作为 Ugi 型一锅反应的底物。通过在乙醚中沉淀分离与PEG连接的产物。同时进行碱催化水解和脱氧乙酰化,然后进行氢化,可以轻松访问新霉素 B 模拟物库,该库已筛选与 HIV mRNA (RRE) 的 Rev 响应元件结合。发现一些产品比尼胺活性更高,IC50 值在微摩尔范围内。
Cu-Mediated Expeditious Annulation of Alkyl 3-Aminoacrylates with Aryldiazonium Salts: Access to Alkyl <i>N</i><sup>2</sup>-Aryl 1,2,3-Triazole-carboxylates for Druglike Molecular Synthesis
作者:Hao-Nan Liu、Hao-Qiang Cao、Chi Wai Cheung、Jun-An Ma
DOI:10.1021/acs.orglett.0c00006
日期:2020.2.21
Alkyl N-aryl 1,2,3-triazole-carboxylates are important molecules or intermediates in medicinal chemistry, but the synthesis of N2-aryl counterparts remains elusive. Herein, we describe a Cu-mediated annulation reaction of alkyl 3-aminoacrylates with aryldiazonium salts, both of which are readily available substrates. Furthermore, alkyl 2-aminoacrylates are also viable substrates. Diverse alkyl N2-aryl
Diastereoselectively Complementary C–H Functionalization Enables Access to Structurally and Stereochemically Diverse 2,6-Substituted Piperidines
作者:Gang Wang、Ying Mao、Lei Liu
DOI:10.1021/acs.orglett.6b03372
日期:2016.12.16
The preparation of 2,6-substituted piperidine derivatives through diastereoselective C–H functionalization of corresponding nitrogen heterocycles represents an appealing protocol and yet remains a formidable challenge. Here, we describe a stereochemically complementary oxidative C–H functionalization of N-carbamoyl tetrahydropyridines with a wide variety of building blocks, providing either the cis-
Metal complexes-catalyzed hydrolysis and alcoholysis of organic substrates such as alkenyl esters, alkenyl ethers, and azlactones (oxazol-5(4H)-ones) are described. These reactions were applied for kineticresolution of chiral compounds and high selectivities were achieved with vinylethers of 2-substituted cyclohexanols, 1,1′-bi-2-naphthols, 1,1′-bi-2-phenols, and 4,4-disubstituted azlactones. Oxidative
HSAB Driven chemoselectivity in alkylation of uracil derivatives. A high yielding preparation of 3-alkylated and unsymmetrically 1,3-dialkylated uracils
作者:Augusto Gambacorta、Mohamed Elmi Farah、Daniela Tofani