Synthesis of 5-Iodo-1,2,3,4-tetrahydropyridines by Rhodium-Catalyzed Tandem Nucleophilic Attacks Involving 1-Sulfonyl-1,2,3-triazoles and Iodides
作者:Zengming Man、Haican Dai、Yinping Shi、Dongdong Yang、Chuan-Ying Li
DOI:10.1021/acs.orglett.6b02428
日期:2016.10.7
Sodium iodide is used for the first time as a nucleophile to trap an α-imino rhodium carbene, which triggers a tandem process involving intermolecular nucleophilic attack and intramolecular SN2 reaction. A series of 5-iodo-1,2,3,4-tetrahydropyridines are obtained in high yield, and the synthetic utility of the products is demonstrated in cross-coupling reactions and the construction of biorelated polycyclic
碘化钠首次用作亲核试剂来捕获α-亚氨基铑卡宾,这引发了涉及分子间亲核攻击和分子内S N 2反应的串联过程。以高收率获得了一系列的5-碘-1,2,3,4-四氢吡啶,并且在交叉偶联反应和生物相关多环化合物的构建中证明了该产物的合成效用。
Dinuclear Zinc-Catalyzed Asymmetric Desymmetrization of Acyclic 2-Substituted-1,3-Propanediols: A Powerful Entry into Chiral Building Blocks
作者:Barry M. Trost、Sushant Malhotra、Takashi Mino、Naomi S. Rajapaksa
DOI:10.1002/chem.200800623
日期:2008.8.28
The asymmetric acylation of meso-2-substituted-1,3-propanediols by using an amphoteric chiraldinuclear zinc catalyst is described. It is has been demonstrated that both 2-alkyl- and 2-aryl-1,3-propanediols can be desymmetrized in high yields and enantioselectivities by using the same family of ligands. Given that both antipodes of the chiral catalyst are available, both enantiomers of the desymmetrized
[EN] VISUAL DETECTION OF PBD INDUCED DNA CROSSLINKS<br/>[FR] DÉTECTION VISUELLE DE RÉTICULATIONS D'ADN INDUITES PAR PBD
申请人:INST NAT SANTE RECH MED
公开号:WO2021074392A1
公开(公告)日:2021-04-22
The present invention relates to the field of oncology, laboratory tools and methods, and especially anti-tumor DNA crosslinking agents. Most patients with advanced solid tumors develop resistance to chemotherapy due to the ability of cancer cells to repair or tolerate sustained DNA damages. The inventors showed that the compounds according to the present invention allow the detection and visualization of alkylated DNA damages induced by PBDs without altering their DNA crosslinking ability. This enables the study of the effect and properties of PBDs. In particular, the present invention relates new derivates of PBD molecules and their synthesis. The present invention also relates to a method for visualizing DNA crosslinking; to a method for assessing the resistance of a tumor to a crosslinking agent and to a method for identifying a molecule or treatment for improving the efficiency of a crosslinking agent.
Synthesis of Various Bridged Ring Systems via Rhodium-Catalyzed Bridged (3+2) Cycloadditions
作者:Yu-Tao He、Li-Xuan Li、Xiaohong Lin、Bao-Long Hou、Chuang-Chuang Li
DOI:10.1021/acs.orglett.1c03837
日期:2022.1.14
N-sulfonyl-1,2,3-triazoles, which allowed the efficient diastereoselective construction of various functionalized and synthetically challenging bridged ring systems. This simple, direct transformation had a broad substrate scope and excellent functional group tolerance. The highly strained polycyclic bicyclo[2.2.2]octa[b]indole core of fruticosine was synthesized efficiently using this methodology.
在这里,我们描述了N-磺酰基-1,2,3-三唑的铑催化桥接 (3+2) 环加成级联反应,这使得各种功能化和合成具有挑战性的桥接环系统的有效非对映选择性构建成为可能。这种简单、直接的转化具有广泛的底物范围和出色的官能团耐受性。使用该方法有效地合成了果糖苷的高应变多环双环[2.2.2]octa[ b ]吲哚核。
[EN] TRANSLOCATION CONTROL ELEMENTS, REPORTER CODES, AND FURTHER MEANS FOR TRANSLOCATION CONTROL FOR USE IN NANOPORE SEQUENCING<br/>[FR] ÉLÉMENTS DE COMMANDE DE TRANSLOCATION, CODES RAPPORTEURS, ET AUTRES MOYENS DE COMMANDE DE TRANSLOCATION DESTINÉS À ÊTRE UTILISÉS DANS LE SÉQUENÇAGE DE NANOPORES
申请人:STRATOS GENOMICS INC
公开号:WO2020236526A1
公开(公告)日:2020-11-26
Phosphoramidate-based monomers are provided for use in the synthesis of expandable polymers for nanopore-based sensing. Such monomers comprising a reporter construct that contain a first reporter code, a symmetrical chemical brancher bearing a translocation control element, and a second reporter code, wherein the ends of the reporter construct are attached to phosphoramidate-nucleoside. Related methods and products are also provided.