在碳-碳双键和氮上具有各种取代方式的αβ-烯烃酰胺都被镁和甲醇还原为相应的饱和酰胺。相同的还原体系将共轭双键处的N-苄基-8-氮杂双环[4.3.0] nona-1(6),3-dien-7-还原为顺式和反式二氢衍生物的混合物。分离的非共轭双键即使在3,4-二苯基取代的化合物中也不会还原。镁和甲醇降低喹啉-2(1 H ^) -酮其3,4-二氢衍生物,和5,6,7,8-四氢喹啉-2(1 H ^) -酮于两个二氢衍生物的混合物。
Fragment-Based Discovery of Low-Micromolar ATAD2 Bromodomain Inhibitors
摘要:
Overexpression of ATAD2 (ATPase family, AAA domain containing 2) has been linked to disease severity and progression in a wide range of cancers, and is implicated in the regulation of several drivers of cancer growth. Little is known of the dependence of these effects upon the ATAD2 bromodomain, which has been categorized as among the least tractable of its class. The absence of any potent, selective inhibitors limits clear understanding of the therapeutic potential of the bromodomain. Here, we describe the discovery of a hit from a fragment-based targeted array. Optimization of this produced the first known micromolar inhibitors of the ATAD2 bromodomain.
An Efficient and General Method for the Heck and Buchwald–Hartwig Coupling Reactions of Aryl Chlorides
作者:Dong-Hwan Lee、Abu Taher、Shahin Hossain、Myung-Jong Jin
DOI:10.1021/ol202177k
日期:2011.10.21
The β-diketiminatophosphane Pd complex acted as a powerful catalyst for the Heck coupling of aryl chlorides with alkenes. Various aryl and heteroaryl chlorides were coupled efficiently under relatively mild conditions. Furthermore, this catalytic system also proved to be highly active in the Buchwald–Hartwig coupling of deactivated and sterically hindered aryl chlorides at room temperature.
The imino‐Nazarov cyclization of the polysubstituted pentan‐1,4‐diene‐3‐imines was realized. To this aim, a one‐pot procedure involving reductive alkenyliminylation of α,β‐unsaturated secondary amides with potassium organotrifluoroborates, followed by acid‐catalyzed imino‐Nazarov cyclization of the polysubstituted pentan‐1,4‐diene‐3‐imine intermediates, was studied systematically. This mild, operationally
strategy), or by condensation of an amide enolate with diethylchlorophosphate (second strategy). Acidic hydrolysis of () or () gives α-amidophosphonate () alkylated or not in the α -position. () and () react with aromatic or aliphatic aldehydes to produce α,β-unsatured secondary or tertiary amides ().
Manganese(I) Catalyzed α-Alkenylation of Amides Using Alcohols with Liberation of Hydrogen and Water
作者:Biplab Keshari Pandia、Chidambaram Gunanathan
DOI:10.1021/acs.joc.1c00685
日期:2021.8.6
Herein, unprecedented manganese-catalyzed direct α-alkenylation of amides using alcohols is reported. Aryl amides are reacted with diverse primary alcohols, which provided the α,β-unsaturated amides in moderate to good yields with excellent selectivity. Mechanistic studies indicate that Mn(I) catalyst oxidizes the alcohols to their corresponding aldehydes and also plays an important role in efficient
Titanium-Promoted Cross-Coupling for the Selective Synthesis of Polysubstituted, Conjugated Amides
作者:Vinoth Kumar Chenniappan、Ronald J. Rahaim
DOI:10.1021/acs.orglett.6b02537
日期:2016.10.7
α,β-Unsaturated amides are important buildingblocks and are key structural elements in a number of biologically active natural products. Despite their importance and prevalence, few methods exist to prepare conjugated amides directly and modularly. To address this gap, a titanium-promoted coupling of alkynes and isocyanates has been developed. The method is highly stereoselective, producing only the