<i>N</i>-Pyridinyl Sulfilimines as a Source for α-Imino Gold Carbenes: Access to 2-Amino-Substituted <i>N</i>-Fused Imidazoles
作者:Xianhai Tian、Lina Song、Matthias Rudolph、Qian Wang、Xinlong Song、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1021/acs.orglett.9b00140
日期:2019.3.15
ynamides is reported. A diverse set of imidazole derivatives is prepared from the corresponding sulfilimines and ynamides. These functionalized cyclic products can undergo further transformations to afford diverse imidazole frameworks. Moreover, in situ synthesis is feasible and shows good potential in the synthesis of nucleoside analogues.
Mechanistic Insights into Transition Metal-Catalysed Oxidation of a Hydroxamic Acid within situ Diels–Alder Trapping of the Acyl Nitroso Derivative
作者:Judith A. K. Howard、Gennadiy Ilyashenko、Hazel A. Sparkes、Andrew Whiting、Allen R. Wright
DOI:10.1002/adsc.200700568
日期:2008.4.7
New insights into the mechanism for the transition metal-mediated oxidation of hydroxamicacids to give intermediate acylnitroso species, with subsequent hetero-Diels–Alder trapping are presented. The activation of triphenylphosphine-ligated ruthenium-salen complexes is examined, and evidence is presented for the ruthenium-oxo species which are involved in the oxidative process of the hydroxamic acid
Heteroaryl amide derivatives are provided, of the Formula: wherein variables are as described herein. Such compounds are ligands that may be used to modulate specific receptor activity in vivo or in vitro, and are particularly useful in the treatment of conditions associated with pathological receptor activation in humans, domesticated companion animals and livestock animals. Pharmaceutical compositions and methods for using such compounds to treat such disorders are provided, as are methods for using such ligands for receptor localization studies.
Heteroaryl amide derivatives are provided, of the Formula: wherein variables are as described herein. Such compounds are ligands that may be used to modulate specific receptor activity in vivo or in vitro, and are particularly useful in the treatment of conditions associated with pathological receptor activation in humans, domesticated companion animals and livestock animals. Pharmaceutical compositions and methods for using such compounds to treat such disorders are provided, as are methods for using such ligands for receptor localization studies.
Syntheses and Biological Activity Studies of Novel Sterol Analogs from Nitroso Diels−Alder Reactions of Ergosterol
作者:Baiyuan Yang、Patricia A. Miller、Ute Möllmann、Marvin J. Miller
DOI:10.1021/ol900997t
日期:2009.7.2
A series of novel sterol analogs was prepared using nitroso Diels-Alder reactions with ergosterol. Most cycloaddition reactions proceeded in an excellent regio- and stereoselective fashion. Further N-O bond cleavage of cycloadducts generated compounds with biological activity in PC-3 and MCF-7 cancer cell lines.