ChemInform Abstract: Heterocyclic Compounds from Trihaloacetylated Enol Ethers and Nitrogen Nucleophiles. Part 2. Trihaloacetylated Enol Ethers. General Synthetic Procedure and Heterocyclic Ring Closure Reactions with Hydroxylamine.

ChemInform ◽  
2010 ◽  
Vol 22 (46) ◽  
pp. no-no
Author(s):  
A. COLLA ◽  
M. A. P. MARTINS ◽  
G. CLAR ◽  
S. KRIMMER ◽  
P. FISCHER
Synthesis ◽  
1991 ◽  
Vol 1991 (06) ◽  
pp. 483-486 ◽  
Author(s):  
Agenor Colla ◽  
Marcos A. P. Martins ◽  
Günter Clar ◽  
Siegfried Krimmer ◽  
Peter Fischer

Molecules ◽  
2019 ◽  
Vol 24 (4) ◽  
pp. 772 ◽  
Author(s):  
Márta Palkó ◽  
Mohamed El Haimer ◽  
Zsanett Kormányos ◽  
Ferenc Fülöp

An uncomplicated, high-yielding synthetic route has been developed to constitute complicated heterocycles, applying domino, click and retro-Diels–Alder (RDA) reaction sequences. Starting from 2-aminocarboxamides, a new set of isoindolo[2,1-a]quinazolinones was synthesized with domino ring closure. A click reaction was performed to create the 1,2,3-triazole heterocyclic ring, followed by an RDA reaction resulting in dihydropyrimido[2,1-a]isoindole-2,6-diones. The absolute configuration, concluded by the norbornene structure that served as a chiral source, remained constant throughout the transformations. The structure of the synthesized compounds was examined by 1H and 13C Nuclear Magnetic Resonance (NMR) methods.


1995 ◽  
Vol 32 (3) ◽  
pp. 739-741 ◽  
Author(s):  
Marcos A. P. Martins ◽  
Alana N. Zoch ◽  
Alex F. C. Flores ◽  
Günter Clar ◽  
Nilo Zanatta ◽  
...  

ChemInform ◽  
2010 ◽  
Vol 26 (49) ◽  
pp. no-no
Author(s):  
M. A. P. MARTINS ◽  
A. N. ZOCH ◽  
A. F. C. FLORES ◽  
G. CLAR ◽  
N. ZANATTA ◽  
...  

2019 ◽  
Vol 19 (15) ◽  
pp. 1219-1254 ◽  
Author(s):  
Abhinav Prasoon Mishra ◽  
Ankit Bajpai ◽  
Awani Kumar Rai

: Nowadays, heterocyclic compounds act as a scaffold and are the backbone of medicinal chemistry. Among all of the heterocyclic scaffolds, 1,4-Dihydropyridine (1,4-DHP) is one of the most important heterocyclic rings that possess prominent therapeutic effects in a very versatile manner and plays an important role in synthetic, medicinal, and bioorganic chemistry. The main aim of the study is to review and encompass relevant studies related to 1,4-DHP and excellent therapeutic benefits of its derivatives. An extensive review of Pubmed-Medline, Embase and Lancet’s published articles was done to find all relevant studies on the activity of 1,4-DHP and its derivatives. 1,4-DHP is a potent Voltage-Gated Calcium Channel (VGCC) antagonist derivative which acts as an anti-hypertensive, anti- anginal, anti-tumor, anti-inflammatory, anti-tubercular, anti-cancer, anti-hyperplasia, anti-mutagenic, anti-dyslipidemic, and anti-ulcer agent. From the inferences of the study, it can be concluded that the basic nucleus, 1,4-DHP which is a voltage-gated calcium ion channel blocker, acts as a base for its derivatives that possess different important therapeutic effects. There is a need of further research of this basic nucleus as it is a multifunctional moiety, on which addition of different groups can yield a better drug for its other activities such as anti-convulsant, anti-oxidant, anti-mutagenic, and anti-microbial. This review would be significant for further researches in the development of several kinds of drugs by representing successful matrix for the medicinal agents.


1983 ◽  
Vol 48 (11) ◽  
pp. 3307-3314 ◽  
Author(s):  
Petr Nesvadba ◽  
Petr Štrop ◽  
Josef Kuthan

The quaternary pyridinium salts Ia-Ic react with alkaline solution of potassium ferricyanide to give the condensed heterocyclic derivatives IIIa, b, IV, whereas the salts Id-If give the pyrrole derivatives IIa-IIc under the same conditions. The diaza heterocycle IIIa reacts with methyl iodide to give methoiodide V, whereas by action of bromine it produces two monobromo derivatives VIa, b. The pyrrole derivatives IIa, b give monobromo derivatives IId, e on bromination. A probable mechanism of formation of the heterocyclic derivatives is discussed.


1977 ◽  
Vol 32 (5) ◽  
pp. 537-542 ◽  
Author(s):  
Uwe Klingebiel ◽  
Anton Meller

Fluorosilanes react with lithium amides and organolithium compounds to give aminofluorosilanes and organofluorosilanes. The reactivity of the monoaminofluorosilanes with butyllithium is decreasing with increasing size of the substituents and with their stabilisation in the molecule. Reactions observed include: a) (2 + 2) cycloaddition, b) ring closure under either C–H-cleavage or under migration of a methanideion and c) formation of stable lithio-aminofluorosilanes.


1984 ◽  
Vol 37 (5) ◽  
pp. 1009 ◽  
Author(s):  
DJ Collins ◽  
PF Drygala ◽  
JM Swan

Reaction of chloromethylphosphonic dichloride (9) with N-methylaniline gave N,N'-dimethyl-N,N'-diphenylchloromethylphosphonodiarnide (10) which upon treatment with aluminium chloride underwent intramolecular Friedel-Crafts alkylation to afford 1-methyl-2-(N'-methyl-N'-phenylamino)-2,3-dihydro-1N-l,2-benzazaphosphole 2-oxide(13a). Similarly, N-methyl-N-phenyl(ch1oromethy1)phenylphosphinamide (15) was cyclized to give 1-methyl-2-phenyl-2,3-dihydro-1H-1,2-benzazaphosphole2-oxide (1 3b). Some unsuccessful approaches to this heterocyclic ring system are also reported.


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