[EN] THIOPHENE-SUBSTITUTED TETRACYCLIC COMPOUNDS AND METHODS OF USE THEREOF FOR TREATMENT OF VIRAL DISEASES<br/>[FR] COMPOSÉS TÉTRACYCLIQUES À SUBSTITUTION THIOPHÈNE ET LEURS MÉHODES D'UTILISATION POUR LE TRAITEMENT DE MALADIES VIRALES
申请人:MERCK SHARP & DOHME
公开号:WO2014110706A1
公开(公告)日:2014-07-24
Thiophene-substituted tetracyclic compounds of formula (I) and pharmaceutically acceptable salts thereof, wherein A, A', R2, R3, R4 and R5 are as defined herein. The compositions comprising at least one thiophene-substituted tetracyclic compound, and methods of using the thiophene-substituted tetracyclic compounds for treating or preventing HCV infection in a patient are also provided.
An asymmetric hydrophosphination of 3,3-disubstituted cyclopropenes catalyzed by Cu(I)-(R,R)-QUINOXP* is developed, affording a series of phosphine derivatives in high to excellent diastereo- and enantioselectivities.
开发了 Cu(I)-( R , R )-QUINOXP*催化的 3,3-二取代环丙烯的不对称氢膦化反应,提供了一系列具有高至优异的非对映选择性和对映选择性的膦衍生物。
Copper-Catalyzed Hydroamination: Enantioselective Addition of Pyrazoles to Cyclopropenes
作者:Minghao Wang、Julie C. Simon、Mengfei Xu、Stephanie A. Corio、Jennifer S. Hirschi、Vy M. Dong
DOI:10.1021/jacs.3c02971
日期:2023.7.12
Chiral N-cyclopropyl pyrazoles and structurally related heterocycles are prepared using an earth-abundant copper catalyst under mild reaction conditions with high regio-, diastereo-, and enantiocontrol. The observed N2:N1 regioselectivity favors the more hindered nitrogen of the pyrazole. Experimental and DFT studies support a unique mechanism that features a five-centered aminocupration.
explored by control experiments, providing a number of key insights. The kinetic process followed by 1H NMR indicated that the reaction was finished in 15 min. Furthermore, the mechanism of silver(I)-catalyzed hydroborylation of cyclopropenes was proposed, with the protonation by methanol as the rate-determining step.
在环丙烯与 B 2 pin 2的氢硼化中开发了一种有效的 (NHC)AgCl 催化,以立体选择性方式产生各种环吡基硼酸酯,可以轻松地转化为通用环丙烷的构建。该方案在露天气氛中的温和反应条件下有效地发挥作用,并且很容易在克规模上应用。这种新颖的方法还通过对照实验进行了详细探索,提供了许多关键见解。1 H NMR的动力学过程表明反应在 15 分钟内完成。此外,提出了银(I)催化环丙烯的硼氢化反应机理,其中甲醇质子化作为速率决定步骤。
Nickel-Catalyzed Enantioselective Hydrothiocarbonylation of Cyclopropenes
in the literature. Herein, we report a nickel-catalyzed enantioselective hydrothiocarbonylation of cyclopropenes for the synthesis of a diverse collection of functionalized thioesters in good to excellent yields with high stereoselectivity. This new method employs an inexpensive, air-stable nickel(II) precursor, which provides enhanced catalyst fidelity against CO poisoning compared to nickel(0) catalysts
使用一氧化碳和硫醇对烯烃进行氢硫羰基化是从简单结构单元合成硫酯的有效方法。由于催化剂中毒的固有挑战,过渡金属催化的不对称硫代羰基化,特别是在利用地球丰富的金属时,在文献中仍然很少见。在此,我们报道了镍催化的环丙烯对映选择性硫代羰基化反应,用于合成多种官能化硫酯,收率良好至优异,具有高立体选择性。这种新方法采用廉价、空气稳定的镍 (II) 前驱体,与镍 (0) 催化剂相比,它可以提高催化剂保真度,防止 CO 中毒。