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Biological activities of ethyl acetate extract of different parts of Hyssopus angustifolius
The findings give a scientific basis to the traditional usage of Hyssopus angustifolius, also showing its potential as rich sources of natural antioxidant compounds. Expand
An Efficient One‐Pot Synthesis of Pyrimido[2,1‐b][1,3]thiazine Derivatives by Reaction of Activated Acetylenes, Thiouracils, and Isocyanides.
The addition of isocyanides to dialkyl acetylenendicarboxylates generates zwitterionic intermediates which are intercepted by thiouracils to give pyrimidothiazines of type (IV)/(V).
Antioxidant and antibacterial activity of flavonoid-, polyphenol- and anthocyanin-rich extracts from Thymus kotschyanus boiss & hohen aerial parts
The extracts of Thymus kotschyanus aerial parts showed its potential as a rich source of natural antioxidant and antibacterial compounds and exerted moderate antibacterial activity against both Gram-negative and Gram-positive bacteria. Expand
An efficient one-pot synthesis of pyrimido[2,1-b][1,3]thiazine derivatives by reaction of activated acetylenes, thiouracils, and isocyanides
Abstract The reactive 1:1 zwitterionic intermediate, formed by the addition of isocyanides to dialkyl acetylenedicarboxylates, was trapped by thiouracils to yield a ketenimine intermediate, whichExpand
Solvent-free Synthesis of Novel Benzothiazole-substituted 4-Thiazolidinones Using Nano Silica-bonded 5-n-Propyl-octahydro-pyrimido[1,2-a]azepinium Chloride as Catalyst
A series of novel benzothiazole-substituted 4-thiazolidinones were synthesised by the one-pot reaction of rhodanine-3-acetic acid derivatives, 2-aminothiophenol, and triphenyl phosphite in theExpand
Biochemical activities of acetone extracts of Hyssopus angustifolius.
The extracts exhibited good antioxidant activity in linoleic acid peroxidation system and weak reducing power ability and the leaf extract showed better antihemolytic activity than the flower and stem. Expand
The Reaction between Tert-Butyl Isocyanide and Acetylenic Esters in Presence of 2-Thenoyltrifluoroacetone: A Synthesis of Highly Functionalised 4H-Pyrans †
Tert-butyl isocyanide reacts with dialkyl acetylenedicarboxylates in the presence of 2-thenoyltrifluoroacetone to yield 4H-pyran derivatives in good yields.
Immobilization of 1,4-Diazabicyclo[2.2.2]Octane (DABCO) over Mesoporous Silica SBA-15: An Efficient Approach for the Synthesis of Functionalized Spirochromenes
Abstract Immobilized 1,4-diazabicyclo[2.2.2]octane (DABCO) over mesoporous silica SBA-15 has been found to be an efficient heterogeneous base catalyst for the synthesis of biologically activeExpand
Synthesis and antibacterial activities of pyrano[3,2-b]pyranones from kojic acid, ethyl cyanoacetate, and benzaldehydes in aqueous K2CO3
Abstract Pyrano[3,2-b]pyranones are prepared in good yields from three-component coupling of kojic acid, ethyl cyanoacetate, and benzaldehydes in aqueous K2CO3. The synthetic compounds exert moderateExpand
Graphene oxide covalently functionalized with an organic superbase as highly efficient and durable nanocatalyst for green Michael addition reaction
A highly efficient and durable nanocatalyst comprising graphene oxide (GO) covalently functionalized with an organic superbase, 1,1,3,3-tetramethylguanidine (TMG), was synthesized. SuccessfulExpand