Results 41 to 50 of about 5,363,495 (332)
Molecules, 2007 Two furostanol saponins were obtained from the rhizomes of Tupistra chinensis Bak. Their structures were determined as 5β-furost-δ25(27)-en-1β,2β,3β,4β,5β,7α,22ξ,26- octaol-6-one-26-O-β-D-glucopyranoside (1) and 5β-furost-
Jing Yang +6 more
doaj +1 more source
Molbank, 2022 aza-BODIPYs are a promising class of IR fluorescent dyes. The introduction of specific substituents could allow these compounds to act as fluorescent sensors.
Dmitry Merkushev +2 more
doaj +1 more source
, 2016 An optimized synthetic procedure for α,ω-bis(bromosilyl)alkanes, BrH2Si(CH2)nSiH2Br (with n = 2 and 3), is proposed. 1,2-Bis(bromosilyl)ethane reacts with ammonia to give 1,4-bis(1-aza-2,5-disilacyclopentane-1-yl)-1,4-disilabutane, traces of 1,6-diaza-2 ...
David W. H. Rankin (1834468) +5 more
core +2 more sources
Molecules, 2008 In order to obtain new compounds with antitumoural action the N-(metaacylaminobenzoyl)-α-acylaminobenzoyl)-α-aminoacids 4-9 were prepared. Thesecompounds were subsequently converted into the corresponding δ2-oxazolin-5-ones 10-15,which in turn ...
Lionte Catalina +5 more
doaj +1 more source
Recent advances in organocatalytic asymmetric aza-Michael reactions of amines and amides
Beilstein Journal of Organic Chemistry, 2021 Nitrogen-containing scaffolds are ubiquitous in nature and constitute an important class of building blocks in organic synthesis. The asymmetric aza-Michael reaction (aza-MR) alone or in tandem with other organic reaction(s) is an important synthetic ...
Pratibha Sharma, Raakhi Gupta, R. Bansal
semanticscholar +1 more source
Synthesis, Biological Evaluation, and Molecular Modeling of Aza-Crown Ethers
Molecules, 2021 Synthetic and natural ionophores have been developed to catalyze ion transport and have been shown to exhibit a variety of biological effects. We synthesized 24 aza- and diaza-crown ethers containing adamantyl, adamantylalkyl, aminomethylbenzoyl, and ε ...
S. Basok +9 more
semanticscholar +1 more source
An efficient one-pot route to an aza-bridged bis-phenanthroline macrocyclic compound
, 2009 A facile synthesis of an aza-bridged bis-1,10-phenanthroline macrocycle is described. X-ray crystallographic analysis of the aza-bridged bis-1,10-phenanthroline revealed that the two central hydrogen atoms were localized on two of the opposite central ...
王文竹; Wang, Wen-jwu; Chuang, Kuo-shen; Luo, Chi-fong; Liu, Hai-yang
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Synthesis, Functionalization, and Optical Properties of 1,2-Dihydro-1-aza-2-boraphenanthrene and Several Highly Fluorescent Derivatives [PDF]
, 2019 Previously unknown 1,2-dihydro-1-aza-2-boraphenanthrene has been synthesized in only three steps from 2-bromo-1-vinylnaphthalene. The reactivity of this new BN-phenanthrene, and of several substituted derivatives, has been tested against bromine and ...
Adrián Pérez-Redondo (1757026) +17 more
core +1 more source
, 2016 8-Aza-5,7-dimethyl-2-trifluoromethylchromone reacts with alkyl mercaptoacetates to give pyrido derivatives of 2-oxa-7-thiabicyclo[3.2.1]octane, which undergo the reductive ring-opening to sulfanyl acetates.
Boris I. Usachev (2432080) +2 more
core +2 more sources
Sensors, 2006 This work presents the construction and application of boron-doped diamond(BDD) thin film electrode as sensor for the determination of three β-agonists, viz.salbutamol, terbutaline and clenbuterol.
Duangjai Nacapricha +10 more
doaj +1 more source