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Chemical survey of some plants Growing in Qatar
(1989 , Other)
Fifty one plants growing in Qatar, belonging to thirty families, were surveyed for alkaloids, anthraquinones, coumarins, flavonoids, tannins and saponins. The medicinal uses of these plants arereported.
Atypical coupling method for the preparation of 1, 2-di (thiophen-2-yl) ethene-1, 2-diol compounds via a cu (ii) catalyst
(
justia patents
, 2022 , Other)
Presented herein is a coupling method for the preparation of 1,2 -di ( thiophen - 2 -yl ) ethane -1,2 -diol compounds, including ( E )-1,2 -di(thiophen - 2 -yl )ethene - 1,2 -diol, via a Cu (II ) catalyst .
DMAP-Catalyzed Reaction of Diethyl 1,3-Acetonedicarboxylate with 2-Hydroxybenzylideneindenediones: Facile Synthesis of Fluorenone-Fused Coumarins
(
Thieme Gruppe
, 2021 , Other)
The base-catalyzed reaction of diethyl 1,3-acetonedicarboxylate with 2-hydroxybenzylidene indenediones was studied. The reaction provides a facile and expeditious protocol for the synthesis of natural product inspired ...
Advances in smart materials and applications
(
Hindawi Publishing Corporation
, 2014 , Other)
[No abstract available]
l-Proline-Catalyzed Three-Component Reaction of 4-Chloro-3-formylcoumarin, Sodium Sulfide, and α-Halo Ketones: A Direct Approach to Thieno[3,2- c ]coumarins
(
Georg Thieme Verlag KG
, 2023 , Other)
A new protocol for the synthesis of thieno[3,2-c]coumarins is disclosed. In this method, a 3-formyl-2-oxo-2H-chromene-4-thiolate anion is generated in situ by treatment of 4-chloro-3-formylcoumarin with sodium sulfide. ...
Erratum to: Carbon black dispersions in surfactant-based microemulsion — Corrigendum (Journal of Materials Research, (2018), 33, 9, (1301-1307), 10.1557/jmr.2017.451)
(
Springer Nature
, 2018 , Other)
In Youssry et al.1, the incorrect image was provided for Fig. 5. The correct figure is below.
Integrated lab-on-a-chip optical biosensor using ultrathin silicon waveguide soi mmi device
(
MDPI AG
, 2020 , Other)
Waveguides with sub-100 nm thickness offer a promising platform for sensors. We designed and analyzed multimode interference (MMI) devices using these ultrathin platforms for use as biosensors. To verify our design ...