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The reaction of bis-pyrimidine (intermediate-II) with corresponding substituted aldehyde resulted in the formation of title compounds (q1 q20).
The compound 9 underwent nucleophilic addition with benzylidenemalononitrile in refluxing ethanol in the presence of piperdine afforded the corresponding substituted pyridine derivative 11 in good yield.
By Vilsmeier-Haack's reaction, starting from these sydnones we obtained the corresponding substituted 3-phenyl-4-formylsydnones in 17‒50 % yield (Scheme 1).
These 1,4-dihydropyridines were also photocatalytically oxidized by PHIK BM to the corresponding substituted pyridines, with very good yields and under mild metal-free conditions.
Three series of new trifluoromethyl substituted quinolone derivatives were synthesized (4a f, 6a f and 8a f) from corresponding substituted anilines by multi-step reactions.
The typical process for these nicotinamide-based diamides derivatives is shown as following: To a solution of newly prepared intermediates 3 (1 mmol) in 8 mL of anhydrous acetonitrile was added the corresponding substituted amines (5 mmol) under nitrogen atmosphere.
Similar(47)
It has been achieved to obtain flexible self-supporting supramolecular polymeric membranes consisting of only 1,3,5-trisubstituted benzene derivatives prepared by highly selective photocyclic aromatization of the corresponding poly (substituted phenylacetylene)s having a columnar structure.
The results show that introducing methoxy group into the alkyl chain of N-ethylpiperidinium considerably increases the fluidity (decreases the viscosity and increases the conductivity) and slightly decreases the thermal and electrochemical stabilities of the corresponding dialkyl substituted ionic liquids.
Compounds having the ethyl substituent in the N1 position follow an oxidation mechanism obeying the sequence ECE with the second step as the r.d.e. in both, protic and aprotic media, thus producing the corresponding ethyl substituted pyridinium cation.
In order to achieve homogeneous products of n-type Ti1−xZrxNiSn, Ti1−xHfxNiSn, and corresponding Sn/Sb substituted alloys, the synthesis conditions were tuned by an optimized arc melting technique, an intermediate high frequency melting step, long time ball milling and a multi-step hot pressing technique.
One interesting feature of MayaFluors for future study is the tetrahedral coordination environment of the boron core and the potential to access chiral MayaFluors from the corresponding asymmetrically substituted homochiral BODIPY precursor.
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