Visible light-mediated photocatalytic oxidative cleavage of activated alkynes <i>via</i> hydroamination: a direct approach to oxamates
作者:Narenderreddy Katta、Mamata Ojha、Arumugavel Murugan、Sagar Arepally、Duddu S. Sharada
DOI:10.1039/c9ra10555g
日期:——
The direct oxidative cleavage of activated alkynes via hydroamination has been described using organic photocatalyst under visible-light irradiation at room temperature. In this reaction, the single electron oxidation of an in situ formed enamine followed by radical coupling with an oxidant finally delivers the oxamate. The key features of this photocatalytic reaction are the mild reaction conditions
Substituted triazolecarboxamides A b s t r a c t The invention relates to substituted triazolecarboxamides of the formula (I) in which R1, R2, R3 and R4 are as defined in the description, to their use as crop treatment agents, in particular as herbicides, and to processes for their preparation.
Design, synthesis and biological evaluation of small molecule inhibitors of CD4-gp120 binding based on virtual screening
作者:Judith M. LaLonde、Mark A. Elban、Joel R. Courter、Akihiro Sugawara、Takahiro Soeta、Navid Madani、Amy M. Princiotto、Young Do Kwon、Peter D. Kwong、Arne Schön、Ernesto Freire、Joseph Sodroski、Amos B. Smith
DOI:10.1016/j.bmc.2010.11.049
日期:2011.1
The low-molecular-weight compound JRC-II-191 inhibits infection of HIV-1 by blocking the binding of the HIV-1 envelope glycoprotein gp120 to the CD4 receptor and is therefore an important lead in the development of a potent viral entry inhibitor. Reported here is the use of two orthogonal screening methods, GOLD docking and ROCS shape-based similarity searching, to identify amine-building blocks that, when conjugated to the core scaffold, yield novel analogs that maintain similar affinity for gp120. Use of this computational approach to expand SAR produced analogs of equal inhibitory activity but with diverse capacity to enhance viral infection. The novel analogs provide additional lead scaffolds for the development of HIV-1 entry inhibitors that employ protein-ligand interactions in the vestibule of gp120 Phe 43 cavity. (C) 2010 Elsevier Ltd. All rights reserved.
Hydroxylamine derivatives as potential inhibitors of nucleic acid synthesis
作者:John B. Hynes、Glen R. Gale、Loretta M. Atkins、David M. Cline、Kenneth F. Hill
resolution of racemic complexes and provided a straightforward access to complexes with excellent enantiopurities (>99.5% ee). Enantiopure complexes were studied by crystal X-ray diffraction and electronic circular dichroism (ECD). Their configuration stabilities were investigated both experimentally and theoretically through the determination of the rotational barrier values. These complexes were tested for