Results 31 to 40 of about 10,026 (250)
, 2016 Gold(I)-Catalyzed Enantioselective Synthesis of Benzopyrans via Rearrangement of Allylic Oxonium ...
Iain D. G. Watson (1950703) +3 more
core +2 more sources
Phenolic Constituents of Flowers
Natural Product Communications, 2008 Species of Hypericum accumulate phenolic compounds with the phloroglucinol substitution pattern, and there are many reports of such substances isolated from the aerial parts of the plants.
Carolina Nör +5 more
doaj +1 more source
Natural Product Communications, 2023 Background/Objective: Volatile compounds present in green Ginkgo biloba L. leaves extracts contain compounds that can undertake free radical scavenging.
Nina Djapic
doaj +1 more source
Biosynthetic insights into p-Hydroxybenzoic acid-Derived benzopyrans in piper gaudichaudianum
, 2017 Piper gaudichaudianum Kunth (Piperaceae) accumulates gaudichaudianic acid, a prenylated benzopyran, as its major component. Interestingly, this trypanocidal compound occurs as a racemic mixture.
A. Batista +6 more
semanticscholar +1 more source
Radical cyclisation : synthesis of 4H-furo(3,2-c)-1-benzopyrans
, 1988 3,4-dihydro-3-bromo-4-(prop-2-ynyloxy)-2H-1-benzopyrans (3) undergo radical cyclisation when treated with nBu3SnH and AIBN to give good yield of 2,3,3a,9b-tetrahydro-3-methylene-4H-furo (3,2-c)benzopyrans (4)
Balasubramanian, K. K. +3 more
core +1 more source
Allenes from 3-bromo-2H-1-benzopyrans
, 1994 The anionic cleavage of 2H-1-benzopyrans results in the formation of ...
Rahman, M. Moshfiqur +3 more
core +1 more source
A Structure–Activity Relationship Study on the Antioxidant Properties of Dithiocarbamic Flavanones
AntioxidantsThe antioxidant properties of 3-dithiocarbamic flavanones have been investigated. The influence of the halogen substituents on ring A of the flavanones and the nature of the secondary amine from the dithiocarbamic moiety have been accounted.
Mihail Lucian Birsa +1 more
doaj +1 more source
Highly enantioselective access to cannabinoid-type tricyles by organocatalytic Diels–Alder reactions
Beilstein Journal of Organic Chemistry, 2012 After prosperous domino reactions towards benzopyrans, the products were used as the starting material in Lewis acid catalyzed and organocatalytic Diels–Alder reactions to build up a tricyclic system.
Stefan Bräse +3 more
doaj +1 more source
Synthesis and Evaluation of Thiochroman-4-One Derivatives as Potential Leishmanicidal Agents
Molecules, 2017 The S-containing heterocyclic compounds benzothiopyrans or thiochromones stand out as having promising biological activities due to their structural relationship with chromones (benzopyrans), which are widely known as privileged scaffolds in medicinal ...
Esteban Vargas +4 more
doaj +1 more source
Food Chemistry International, EarlyView.Gac fruit's high carotenoid content, especially in the aril, makes it an excellent natural red pigment source for food applications, offering a safer alternative to synthetic dyes. Ethanol extraction achieved the highest overall pigment recovery (89.53%), whereas ethyl lactate extraction yielded the highest levels of total carotenoids, β‐carotene ...
N. Netravati +4 more
wiley +1 more source