Results 21 to 30 of about 64,971 (268)

Approach to the Synthesis of Five-Membered Organophosphorus Compounds via Alumoles and Alumolanes

open access: yesChemistry Proceedings, 2022
This work summarizes the results of a new approach to the synthesis of previously undescribed, hard-to-obtain five-membered cyclic organophosphorus compounds: 3-alkyl(aryl)-substituted phospholanes, α,ω-bisphospholanes, polycyclic phospholanes, 4,5 ...
Alevtina L. Makhamatkhanova   +2 more
doaj   +1 more source

α-Bromodiazoacetamides – a new class of diazo compounds for catalyst-free, ambient temperature intramolecular C–H insertion reactions

open access: yesBeilstein Journal of Organic Chemistry, 2013
In this work, we introduce a new class of halodiazocarbonyl compounds, α-halodiazoacetamides, which through a metal-free, ambient-temperature thermolysis perform intramolecular C–H insertions to produce α-halo-β-lactams.
Åsmund Kaupang, Tore Bonge-Hansen
doaj   +1 more source

Predicting B cell receptor substitution profiles using public repertoire data. [PDF]

open access: yesPLoS Computational Biology, 2018
B cells develop high affinity receptors during the course of affinity maturation, a cyclic process of mutation and selection. At the end of affinity maturation, a number of cells sharing the same ancestor (i.e.
Amrit Dhar   +3 more
doaj   +1 more source

Synthesis and Characterization of New Cyclic Aminobenzoquinones

open access: yesJournal of the Turkish Chemical Society, Section A: Chemistry, 2018
The aim of this research is to synthesize and characterize of new cyclic members of cyclic aminobenzoquinones. Mono amino substituted products; 2-chloro-5,6-dimethyl-3-(pyrrolidin-1-yl)-1,4-benzoquinone (2), 2-chloro-5,6-dimethyl-3-(piperidin-1-yl)-1,4 ...
Amaç Fatih Tuyun, Mahmut Yıldız
doaj   +1 more source

Aryl substitution of pentacenes

open access: yesBeilstein Journal of Organic Chemistry, 2014
A series of 11 new pentacene derivatives has been synthesized, with unsymmetrical substitution based on a trialkylsilylethynyl group at the 6-position and various aryl groups appended to the 13-position.
Andreas R. Waterloo   +4 more
doaj   +1 more source

MODIFICATION OF THE ENERGY-SATURATED HETEROGENEOUS COMPOSITE MATERIAL BY CYCLIC NITRAMINES

open access: yesВесці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2018
Several methods have been described for increasing the main characteristics (density, heat of combustion, combustion temperature, gas formation index) and operating properties (combustion speed and temperature, total and specific impulse, properties of ...
A. Ph. Ilyushchanka   +2 more
doaj   +1 more source

3R-Substituted and Norbornane-Annelated 1H-Phospholanoxides: Synthesis and Structure

open access: yesChemistry Proceedings, 2021
A method for the synthesis of 3R-substituted and norbornane-annelated 1H-phospholan oxides has been developed. The method is based on the in situ substitution of the Al atom by the P atom in five-membered cyclic alumolanes using phosphorus trichloride ...
Alevtina L. Makhamatkhanova   +3 more
doaj   +1 more source

Preparation and Electrochemical Properties of LiCuxMn2-xO4 (x ≤ 0.10) Cathode Material by a Low-Temperature Molten-Salt Combustion Method

open access: yesInternational Journal of Electrochemical Science, 2015
Single-phase LiCuxMn2-xO4 cathode materials were prepared by a molten-salt combustion method. Surface morphology and particle size of the synthesized materials were characterized by scanning electron microscopy.
Jijun Huang   +7 more
doaj   +1 more source

The Use of Aryl-Substituted Homophthalic Anhydrides in the Castagnoli–Cushman Reaction Provides Access to Novel Tetrahydroisoquinolone Carboxylic Acid Bearing an All-Carbon Quaternary Stereogenic Center

open access: yesMolecules, 2022
Novel aryl-substituted homophthalic acids were cyclodehydrated to the respective homophthalic anhydrides for use in the Castagnoli–Cushman reaction.
Nazar Moshnenko   +4 more
doaj   +1 more source

Outcomes and Surgical Management of Malignant Rhabdoid Tumor of the Kidney: A Report From the Pediatric Surgical Oncology Research Collaborative

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Purpose Malignant rhabdoid tumor of the kidney (MRTK) is a rare, aggressive tumor seen in young children. The optimal timing of resection for locally advanced tumors is not well‐defined. The purpose of this study is to evaluate modern oncologic outcomes and the impact of surgical timing. Methods A multicenter retrospective review was performed
Hannah N. Rinehardt   +76 more
wiley   +1 more source

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