Results 41 to 50 of about 8,110 (222)

[(Cp-R)M(CO)3] (M= Re or 99mTc) Conjugates for Theranostic Receptor Targeting

open access: yesCHIMIA, 2013
Cyclopentadienyl complexes of 99mTc became accessible via a retro Diels-Alder synthetic approach of dimerized cyclopentadiene derivatives. So far, this approach was limited to derivatives comprising a carboxylic acid group, directly conjugated ...
Daniel Can   +4 more
doaj   +1 more source

A Simple Approach for Visual Rearrangement: 3D Mapping and Semantic Search [PDF]

open access: yesarXiv, 2022
Physically rearranging objects is an important capability for embodied agents. Visual room rearrangement evaluates an agent's ability to rearrange objects in a room to a desired goal based solely on visual input. We propose a simple yet effective method for this problem: (1) search for and map which objects need to be rearranged, and (2) rearrange each
arxiv  

Crystal structures of 1′-aminocobaltocenium-1-carboxylic acid chloride monohydrate and of its azo dye 1′-[2-(1-amino-2,6-dimethylphenyl)diazen-1-yl]cobaltocenium-1-carboxylic acid hexafluoridophosphate monohydrate

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2019
1′-Aminocobaltocenium-1-carboxylic acid chloride, [Co(C5H6N)(C6H5O2)]Cl·H2O, (3), and its azo derivative 1′-[2-(1-amino-2,6-dimethylphenyl)diazen-1-yl]cobaltocenium-1-carboxylic acid hexafluoridophosphate, [Co(C13H14N3)(C6H5O2)]PF6·H2O (5) were obtained ...
Markus Jochriem   +3 more
doaj   +1 more source

New approaches to amino-pyrrolidine guanidine compounds [PDF]

open access: yes, 2021
Cernumidine is an alkaloid of natural origin isolated from the plant Solanum cernuum Vell with the ability to inhibit the production of IL-8 from HT-29 colon carcinoma.
Leitão, Flávia Lidónio
core  

Synthesis, characterization and antimicrobial investigation of new piperidinyl tetrahydrothieno[2,3-c]isoquinolines

open access: yesArabian Journal of Chemistry, 2021
Herein, we describe the synthesis of novel piperidinyl thieno tetrahydroisoquinolines attached or fused to other new heterocycles. The diazotization of the previously synthesized pyrrolyl carbohydrazide 1 followed by several reactions with ethanol ...
Remon M. Zaki   +4 more
doaj  

Lossen Rearrangement Reaction of Aromatic and Aliphatic Hydroxamates [PDF]

open access: yes, 2016
The main goal of this research is to explore a potential of the most green and non-toxic possible route to the synthesis of industrially important chemicals, such as isocyanates and amines, based on the bio-based starting materials.
Sanaallah, Mirvat
core   +2 more sources

The Synthesis and Characterization of the 2,2\u27-Bisacylazide of 3,3\u27-Bipyridine [PDF]

open access: yes, 1972
The primary objective of this research has been the synthesis and characterization of a new heterocyclic diacylazide, the 2,2\u27-bisacylazide of 3,3\u27-bipyridine 19.
El-Fayoumy, Magdy Adly Guirguis
core   +1 more source

An alternative approach to aminodiols from Baylis-Hillman adducts: stereoselective synthesis of chloramphenicol, fluoramphenicol and thiamphenicol [PDF]

open access: yes, 2015
We describe herein a new approach for the stereoselective synthesis of broad spectrum antibiotics from Baylis-Hillman adducts. The strategy is based on the preparation of an ene-carbamate directly from a Baylis-Hillman adduct using a Curtius ...
Coelho, Fernando, Mateus, Cristiano R.
core   +1 more source

Boranes in Organic Chemistry 2. ОІ-Aminoalkyl- and ОІ-Sulfanylalkylboranes in Organic Synthesis

open access: yesEurasian Chemico-Technological Journal, 2002
Problems on using of ОІ-aminoalkyl- and ОІ-sulfanylalkylboranes in organic synthesis are considered in this review. The synthesis of boron containing a-aminoacids by Curtius rearrangement draws attention.
V.M. Dembitsky   +2 more
doaj   +1 more source

Redefining the Scope of the Curtius Reaction via a Dehomologation of Carboxylic Acids Bearing an Alpha Leaving Group. Determining the Stereoelectronic Limitations of the Crimmins Anti-selective Asymmetric Glycolate Aldol Addition Reaction. [PDF]

open access: yes
The Curtius rearrangement is an important synthetic transformation in organic chemistry and is named in honor of Theodore Curtius who developed this reaction in the late 19th century.
Odeh, Joy
core   +2 more sources

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