A new and simple synthesis of 2-arylethynylindole and 2-arylethynylpyrrole is described. N-Deprotection and subsequent base-catalyzed elimination of N-tosylheteroaryl benzyl ketones are the key steps of the process.
Zinc (II) complex immobilized on the surface of magnetic nanoparticles modified with phenanthroline: A novel and efficient nanomagnetic reusable catalyst for cross-coupling reaction of aryl iodides with terminal aromatic alkynes
Abstract A novel and green nanomagnetic zinc catalyst were fabricated via the immobilization of zinc (II) complex on the surface of magneticnanoparticles modified with phenanthroline (MNPs-Phen-Zn(II)). The structure of MNPs-Phen-Zn(II) nanomaterial was characterized by a series of spectroscopic techniques including FT-IR spectroscopy, SEM, TEM, EDX, XRD, VSM, and ICP-OES. The resulting zinc nanomagnetic
摘要 通过将锌 (II) 络合物固定在经菲咯啉修饰的磁性纳米粒子 (MNPs-Phen-Zn(II)) 表面,制备了一种新型绿色纳米磁性锌催化剂。通过FT-IR、SEM、TEM、EDX、XRD、VSM和ICP-OES等一系列光谱技术对MNPs-Phen-Zn(II)纳米材料的结构进行了表征。所得锌纳米磁性催化剂对通过C(sp 2 ) 合成二取代炔烃具有很高的催化活性。)–C(sp) 在环保条件下炔烃与芳基碘化物的交叉偶联反应。据我们所知,这是第一份关于在不添加 Pd 和 Cu 源的情况下使用锌纳米磁性催化剂进行炔烃与芳基碘化物的 Sonogashira 型交叉偶联反应的报道。从市售材料制备催化剂的简单性、优异的化学选择性、易于产物分离、催化剂的直接回收和可重复使用且活性不变,使我们的程序成为一种绿色实用的方法。
Palladium-Catalyzed Regioselective Alkynylation of Pyrroles and Azoles under Mild Conditions: Application to the Synthesis of a Dopamine D-4 Receptor Agonist
作者:Etienne Brachet、Philippe Belmont
DOI:10.1021/acs.joc.5b01093
日期:2015.8.7
A mild and general method for the direct alkynylation of azoles such as pyrrole, indole, and 7-azaindole is described here. Using a simple catalytic system such as Pd(OAc)(2) (2.5 mol %), P(tBu)(2)Me center dot HBF4 (5 mol %), and NaOAc (2 equiv) allowed the regioselective introduction of various alkynyl residues at the C-2 position of pyrroles. Interestingly, C-2 alkynylation was also observed on C-3-substituted indoles, whereas classical C-3 alkynylation was obtained on selected unsubstituted indoles and 7-azaindole. Our methodology has been illustrated by the efficient synthesis of a potential schizophrenia drug (dopamine D-4 inhibitor).
[EN] NUCLEOSIDE COMPOUNDS FOR TREATING VIRAL INFECTIONS<br/>[FR] COMPOSES NUCLEOSIDES POUR LE TRAITEMENT D'INFECTIONS VIRALES
申请人:GENELABS TECH INC
公开号:WO2006116557A1
公开(公告)日:2006-11-02
[EN] Disclosed are compounds of formula I1 compositions and methods for treating viral infections caused by a Flaviviridae family virus, such as hepatitis C virus. HN' "I f 1 CH, W1O X [FR] La invention concerne des compositions de composés de formule I1 et des procédés pour le traitement d'infections virales provoquées par un virus de la famille Flaviviridae, tel que le virus de l'hépatite C. HN' ''I f 1 CH, W1O X