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Phosphazene superbase P- t-Bu mediated iodoaminocyclization of 2-(1-alkynyl)benzamides is reported. The reaction works under ambient conditions, and instantaneously results in the synthesis of isoindolin-1-ones in 65-97% yields, in a regio- and stereoselective manner. The exclusive formation of products with Z-geometry (across the exo C=C bond) has been confirmed through X-ray crystallography. The methodology also provides an easy access to Aristolactams, an important class of natural products. This has been successfully demonstrated by synthesizing two Aristolactam derivatives (including Cepharanone B).
This article was published in the following journal.
Name: The Journal of organic chemistry
A concise approach to Neu5Ac-α-2,3-LacNPhth trisaccharide derivative was developed. Firstly, the regio/stereoselective glycosylation between glycoside donors and glucoNPhth diol acceptors was investi...
Gold(i) catalysed regio- and stereoselective intermolecular hydroamination of internal alkynes was developed for the effective synthesis of a series of (Z)-functionalised vinylazoles under solvent fre...
A method for the simple and efficient iodoselenylation of simple alkynes under mild conditions using commercially available molecular iodine (I2) and diorganoyldiselenides as starting materials has be...
A regio- and stereoselective silver-catalyzed formal carbene insertion into 1,3-dicarbonyls has been developed, using N-nosylhydrazones as diazo surrogates. Two new C-C bonds are constructed at the ca...
Regio- and Stereoselective Electrophilic Cyclization Approach for the Protecting-Group-Free Synthesis of Alkaloids Lennoxamine, Chilenine, Fumaridine, 8-Oxypseudoplamatine and 2-O-Methyloxyfagaronine.
A unified strategy for protecting-group-free synthesis of alkaloids lennoxamine, chilenine, fumaridine, 8-oxypseudoplamatine and 2-O-methyloxyfagaronine is reported. The core isoindolin-1-one and isoq...
Primary objectives: 1. To comprehensively characterize steady state stereoselective pharmacokinetics of bupropion and its primary and secondary metabolites in healthy volunteers ...
The purpose of this study is to better understand the contribution of sympathetic vasoconstriction to impaired insulin-mediated vasodilation and subsequently insulin-mediated glucose uptak...
This is an open-label, single arm trial in which patient who have ongoing antibody mediated rejection of a kidney transplant deemed refractory to maximal medical therapy are given the comp...
The goal is to pilot a parent-mediated intervention for feeding challenges in children with autism building on our recent research and current successful models already being used. A paren...
To establish the safety and efficacy of indocyanine green-mediated photothrombosis (i-MP) for the treatment of patients with neovascular age-related macular degeneration.
BENZOIC ACID amides.
A family of enzymes that catalyze the stereoselective, regioselective, or chemoselective syn-dehydrogenation reactions. They function by a mechanism that is linked directly to reduction of molecular OXYGEN.
The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activa
The introduction of functional (usually cloned) GENES into cells. A variety of techniques and naturally occurring processes are used for the gene transfer such as cell hybridization, LIPOSOMES or microcell-mediated gene transfer, ELECTROPORATION, chromosome-mediated gene transfer, TRANSFECTION, and GENETIC TRANSDUCTION. Gene transfer may result in genetically transformed cells and individual organisms.
A catalytic subunit of the NuA4 histone acetyltransferase complex that functions in transcriptional activation of genes by acetylation of nucleosomal HISTONES H4 and H2A, altering nucleosome-DNA interactions and interaction of the modified histones with other activating transcription factors. It may control gene expression changes associated with oncogene and proto-oncogene mediated growth induction, tumor suppressor mediated growth arrest; CELL AGING; APOPTOSIS; and DNA REPAIR. It is polyubiquitinated and degraded during HIV-1 infection through its interaction with the viral TAT PROTEIN.
Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...