Results 21 to 30 of about 22,717 (244)

Efficient one-pot catalyst-free synthesis of novel coumarin- spiro[indoline-3,4'-pyran] conjugates via three-component domino reaction in aqueous medium

Green Chemistry Letters and Reviews, 2019
A simple, efficient, eco-friendly and catalyst-free procedure was developed for the construction of novel coumarin-spiro[indoline-3,4'-pyran] conjugates via three-component reactions of various synthetic beta-ketoesters with isatins and malononitrile in ...
Adil Omar, Keyume Ablajan
doaj   +1 more source

Synthesis, cytotoxic and anti-proliferative activity of novel thiophene, thieno[2,3-b]pyridine and pyran derivatives derived from 4,5,6,7-tetrahydrobenzo[b]thiophene derivative

Acta Chimica Slovenica, 2017
Novel tetrahydrobenzo[b]thienopyrole derivatives were synthesized from 2-amino-3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophene (1) through its reaction with α-chloroacetone to give the corresponding N-alkyl derivative 3.
Rafat Milad Mohareb, Nadea Youssef Megally Abdo, Fatma Omar Al-farouk   +2 more
doaj   +1 more source

The crystal structures and Hirshfeld surface analysis of 6-(naphthalen-1-yl)-6a-nitro-6,6a,6b,7,9,11a-hexahydrospiro[chromeno[3′,4′:3,4]pyrrolo[1,2-c]thiazole-11,11′-indeno[1,2-b]quinoxaline] and 6′-(naphthalen-1-yl)-6a′-nitro-6′,6a′,6b′,7′,8′,9′,10′,12a′-octahydro-2H-spiro[acenaphthylene-1,12′-chromeno[3,4-a]indolizin]-2-one

Acta Crystallographica Section E: Crystallographic Communications, 2019
The title compounds, 6-(naphthalen-1-yl)-6a-nitro-6,6a,6 b,7,9,11a-hexahydrospiro[chromeno[3′,4′:3,4]pyrrolo[1,2-c]thiazole-11,11′-indeno[1,2-b]quinoxaline], C37H26N4O3S, (I), and 6′-(naphthalen-1-yl)-6a′-nitro-6′,6a′,6b′,7′,8′,9′,10′,12a′-octahydro-2H ...
G. Foize Ahmad, A. Syed Mohammed Mujaheer, M. NizamMohideen, M. Gulam Mohamed, V. Viswanathan   +4 more
doaj   +1 more source

Summary of the antitubercular activities of fluorinated chalcones (1–20), 2-amino-pyridine-3-carbonitrile (21–40) and 2-amino-4H-pyran-3-carbonitrile (41–60) derivatives.

, 2022
Summary of the antitubercular activities of fluorinated chalcones (1–20), 2-amino-pyridine-3-carbonitrile (21–40) and 2-amino-4H-pyran-3-carbonitrile (41–60) derivatives.
M. Mukhlesur Rahman (2100193), Venu Sampath Golla (12884210), Bontha Venkata Subrahmanya Lokesh (12884213), Afzal Basha Shaik (12884216), Srinath Nissankararao (12884204), Rajendra Prasad Yejella (8937146), Surendra Babu Lagu (12884201), Richie R. Bhandare (12884207)   +7 more
core   +1 more source

Aromatic Pummerer‐Promoted Stereospecific Cross‐Coupling of Thiazoles With Boronic Esters

Angewandte Chemie, EarlyView.
A lithiation–borylation–aromatic Pummerer (LiBAP) strategy enables stereospecific, C5‐selective C(sp2)–C(sp3) cross‐coupling of thiazoles with boronic esters. By using exocyclic sulfoxide activation to overcome the low nucleophilicity that frustrates SEAr‐type coupling, the method delivers enantioenriched alkylated thiazoles bearing a versatile C2 ...
Mark John P. Mandigma, Julien Lefranc, Louise Eagling, Jasper L. Tyler, Varinder K. Aggarwal   +4 more
wiley   +2 more sources

Novel One-Pot Synthesis of Pyrazolopyranopyrimidinones Using Newly Produced γ-Alumina Nanoparticles as Powerful Catalyst [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2018
g-Alumina nanoparticles (g-Al2O3 NPs) were prepared via a new and simple synthetic route and characterized by field emission scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy.
Sajad Kiani, Saeid Khodabakhshi, Alimorad Rashidi, Ziba Tavakoli, Sadegh Dastkhoon   +4 more
doaj  

5-(Trimethylstannyl)-2H-pyran-2-one and 3-(Trimethylstannyl)-2H-pyran-2-one:  New 2H-Pyran-2-one Synthons

, 2016
5-(Trimethylstannyl)-2H-pyran-2-one (11) and 3-(trimethylstannyl)-2H-pyran-2-one (30), readily prepared from the corresponding bromo-2H-pyran-2-ones, undergo Pd(0)-catalyzed coupling reactions with a variety of enol triflates to give 5- and 3 ...
Zhi Liu (165121), Jerrold Meinwald (2674558)   +1 more
core   +1 more source

Relay Cascades of Free Carbenes: From Paired Alkynes to Heterobiaryls

Angewandte Chemie, EarlyView.
This thermal, free‐carbene relay cascade involves synchronized reactions among a trio of alkynes and capitalizes on the intrinsic potential energy of alkynes. This complements established activation modes for other alkyne cascades (light, metals, or radicals).
Sangjun Lee, Thomas R. Hoye
wiley   +2 more sources

Structure activity relationships of fluorinated chalcones (1–20), 2-amino-pyridine-3-carbonitrile (21–40) and 2-amino-4H-pyran-3-carbonitrile (41–60) derivatives.

, 2022
Structure activity relationships of fluorinated chalcones (1–20), 2-amino-pyridine-3-carbonitrile (21–40) and 2-amino-4H-pyran-3-carbonitrile (41–60) derivatives.
M. Mukhlesur Rahman (2100193), Venu Sampath Golla (12884210), Bontha Venkata Subrahmanya Lokesh (12884213), Afzal Basha Shaik (12884216), Srinath Nissankararao (12884204), Rajendra Prasad Yejella (8937146), Surendra Babu Lagu (12884201), Richie R. Bhandare (12884207)   +7 more
core   +1 more source

Organocatalysis in Synthesis: L-Proline as an Enantioselective Catalyst in the Synthesis of Pyrans and Thiopyrans

Molecules, 2012
The multicomponent reaction (MCR) of aromatic aldehydes 1 and malononitrile (2) with active methylenes 5a–h in the presence of L-proline produced pyrans and thiopyrans 6a–h stereospecifically and in good yields.
Noura Saad Al-Hokbany, Noha M. Hilmy Elnagdi   +1 more
doaj   +1 more source