Auf das Zentralnervensystem wirkende Substanzen XXV. Reaktionen der ?-substituierten ?-Lactone II. Eine neue allgemeine Synthese ?-substituierter Propions�uren und deren Derivate
作者:Bruno J. R. Nicolaus、Luigi Mariani、Emilio Testa
DOI:10.1002/hlca.19610440427
日期:——
Hydrochloric acid and hydrobromic acid react with α-mono- and α, α-disubstituted β-lactones under ring cleavage leading unequivocally to the corresponding α-mono- or α, α-disubstituted β-halogenopropionic acids. These products are interesting starting materials for the preparation of new compounds and can be reduced by zinc and formic acid to the corresponding propionic acids. The described synthesis
Compounds having the formula
are hepatitis C (HCV) polymerase inhibitors. Also disclosed are a composition and method for inhibiting hepatitis C (HCV) polymerase, processes for making the compounds, and synthetic intermediates employed in the processes.
Copper(II)/Silver(I)-Catalyzed Sequential Alkynylation and Annulation of Aliphatic Amides with Alkynyl Carboxylic Acids: Efficient Synthesis of Pyrrolidones
copper‐catalyzed alkynylation/annulation of aliphatic amides with alkynyl carboxylic acids is discussed in this paper. A broad range of easily accessible alkynyl carboxylic acids were introduced at the β‐methyl group of aliphatic amides with the assistance of an 8‐aminoquinolyl auxiliary group via decarboxylation to achieve the subsequent cyclic CNbond formation within one hour. High selectivity of β‐methyl
本文讨论了通过铜催化的脂肪族酰胺与炔基羧酸的烷基化/环化反应合成吡咯烷酮的高效方法。在8-氨基喹啉基辅助基团的帮助下,通过脱羧作用,在脂肪族酰胺的β-甲基基团上引入了一系列易于获得的炔基羧酸,以在一小时内形成随后的环状CN键。观察到β-甲基对亚甲基的选择性高,并且该催化体系扩展至亚甲基CH键的活化作用失败。在脂族酰胺的α-位置具有两个不同基团的底物会导致非对映异构体的形成1 H NMR光谱。反应后,通过用稀对甲苯磺酸处理,可以很容易地将最初生产的具有Z型构型的产品转变为具有E型构型的相应产品。这种催化串联脱羧环化提供的SP的直接官能了新的机遇3 ç H键。
Nickel-catalyzed direct thiolation of unactivated C(sp<sup>3</sup>)–H bonds with disulfides
作者:Sheng-Yi Yan、Yue-Jin Liu、Bin Liu、Yan-Hua Liu、Zhuo-Zhuo Zhang、Bing-Feng Shi
DOI:10.1039/c5cc01436k
日期:——
The first nickel-catalyzed thiolation of unactivatedC(sp3)-Hbonds with disulfides is described.
描述了未活化的C(sp 3)-H键与二硫键的首次镍催化的巯基化反应。
Anti-Infective Agents
申请人:Hutchinson Douglas K.
公开号:US20080193413A1
公开(公告)日:2008-08-14
Compounds having the formula
are hepatitis C(HCV) polymerase inhibitors. Also disclosed are a composition and method for inhibiting hepatitis C(HCV) polymerase, processes for making the compounds, and synthetic intermediates employed in the processes.