Results 121 to 130 of about 44,043 (291)

Synthesis of Benzothiophene-Fused Pyran Derivatives via Piperidine Promoted Domino Reaction

open access: yesHeteroatom Chemistry, 2019
A new domino reaction between thioaurones and malononitrile has been reported. This reaction allows efficient access to benzothiophene-fused pyran derivatives in good yields under mild reaction conditions.
Shihang Li   +3 more
doaj   +1 more source

Bioassay-Guided Isolation of 2-[P-(2-Carboxyhydrazino)Phenoxy]-6-(Hydroxymethyl)Tetrahydro-2h-Pyran-3,4,5-Triol From Oroxylum Indicum and Investigation of Its Molecular Mechanism Action of Apoptosis Induction

open access: green, 2021
Asem Robinson Singh   +6 more
openalex   +2 more sources

Novel functionalized monomers based on kojic acid: snythesis, characterization, polymerization and evalution of antimicrobial activity

open access: yesDesigned Monomers and Polymers, 2017
Two novel acrylate monomers, [5-(benzyloxy)-4-oxo-4H-pyran-2-yl]methyl acrylate and {1-[(5-(benzyloxy)-4-oxo-4H-pyran-2-yl)methyl]-1,2,3-triazol-4-yl}methyl acrylate were synthesized by the reaction of 5-benzyloxy-2-(hydroxymethyl)-4H-pyran-4-one and 5 ...
Mahnaz Saraei   +3 more
doaj   +1 more source

Synthesis and chemical properties of 3-acyl- and 3-carbethoxy-4-pyrones [PDF]

open access: yes, 2013
Реакция 1-арил-2-диметиламинометиленбутан-1,3-дионов с диэтиоксалатом в присутствии гидрида натрия в ТГФ приводит к образованию этил 5-ароил-4-оксо-4Н-пиран-2- карбоксилатам, из которых 4-оксо-6-арил-4Н-пиран-2-карбоновые кислота (6- арилкомановая ...
Obydennov, D. L.   +1 more
core  

Analisis Kualitatif dan Kuantitatif Minyak Atsiri Dari Bunga Kamboja Putih (Plumeria acuminata W.T.Ait.) dan Bunga Kamboja Merah (Plumeria rubra L.) [PDF]

open access: yes, 2010
Telah dilakukan penelitian untuk menganalisis secara kualitatif dan kuantitatif minyak atsiri bunga kamboja putih (Plumeria acuminata W.T.Ait.) dan bunga kamboja merah (Plumeria rubra L.).
Phang, Devi Vionita
core  

6-Unsubstituierte 2H-Pyran-2-one Synthese und Reaktivität

open access: yesCHIMIA, 1992
Although the 2H-pyran-2-ones have been known for more than 100 years, their importance as versatile intermediates was not widely recognized before the sixties of this century.
Vratislav Kvita, Walter Fischer
doaj   +2 more sources

Photolysis at long wavelengths of amino acid ester derivatives based on 4-methyl-6-methoxy-2-oxo-2H-naphtho[1,2-b]pyrans [PDF]

open access: yes, 2011
Ester derivatives of fused 4-methyl-6-methoxy-2-oxo-2H- naphtho[1,2-b]pyran, using valine and phenylalanine as model bifunctional molecules were synthesised, to assess its applicability as a photocleavable protecting group, for solution phase organic ...
Costa, Susana P. G.   +4 more
core  

Utility of 4-(4-acetoaminophenyl)-4-oxo-but-2-enoic acid to prepare Pyranand Pyridine derivatives as building blocks in Heterocyclic Synthesis [PDF]

open access: yes, 2010
The present work is devoted to study the interaction of β -aroylacrylic acid derivative (1) with malononitrile in the presence of piperidine and/or ammonium acetate, then using the formed compounds as a starting material for synthesizing fused and ...
Abd El-Gwad, I.   +4 more
core  

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