19225-63-9Relevant academic research and scientific papers
An efficient heterogeneous iron oxide nanoparticle catalyst for the synthesis of 9-substituted xanthene-1,8-dione
Thirumalai, Dhakshanamurthy,Gajalakshmi, Shanmugam
, p. 2657 - 2668 (2020)
Abstract: An efficient and simple method for the synthesis of xanthene derivatives by using iron oxide nanoparticles (NPs) as a catalyst has been investigated. Synthesis of 9-substituted xanthene-1,8-dione derivatives involves one-pot reaction of dimedone
Features of the Reaction of Dimedone with Some Amines in the Presence of Mercury(II) Acetate
Hobosyan,Balyan,Nersisyan,Galechyan,Sargsyan,Tamazyan,Ayvazyan
, p. 2518 - 2521 (2021/02/12)
Abstract: Regiochemistry of the reaction of N-substituted propargylamines with dimedone in the presence of mercury(II) acetate was studied. Xanthene and diene derivatives, as well as symmetric mercury aminopropinides, were obtained, for one of which the c
Tungstophosphoric acid nanoparticles supported on polyamic acid: A mild and recoverable heterogeneous catalyst for the selective synthesis of mono and bulky bis(1,8-dioxooctahydroxanthene)s under solvent-free conditions
Nasr-Esfahani, Masoud,Rafiee, Zahra,Kashi, Hassan
, p. 790 - 799 (2016/05/09)
A series of 1,8-dioxooctahydroxanthene derivatives and some crowded bis(1,8-dioxooctahdroxanthene) were selectively synthesized using tungstophosphoric acid nanoparticles supported on polyamic acid (TPA/PAA) as a new catalyst in solvent-free conditions. T
Secondary amine based ionic liquid: An efficient catalyst for solvent free one pot synthesis of xanthenes and benzoxanthenes
Das, Pranab J.,Das, Jupitara
, p. 11745 - 11752 (2015/02/19)
Ionic liquids (IL) prepared from dialkylamines and concentrated sulphuric acid were used in an operationally simple, cost effective, efficient and environmentally benign synthesis of xanthenes and benzoxanthenes. Three ILs were screened for their efficien
A green and efficient procedure for one-pot synthesis of xanthenes and acridines using silica boron-sulfuric acid nanoparticles (SBSANs) as a solid Lewis-protic acid
Khalafi-Nezhad, Ali,Panahi, Farhad,Mohammadi, Somayeh,Foroughi, Habib Ollah
, p. 189 - 200 (2013/07/26)
Silica boron-sulfuric acid nanoparticles (SBSANs) as a solid Lewis-protic acid have been found to be an efficient heterogeneous catalyst in the synthesis of xanthene and acridine derivatives. The SBSAN-catalyzed reaction between carbonyl compound (aldehyd
A synthetic entry into fused pyran derivatives through carbon transfer reactions of 1,3-oxazinanes and oxazolidines with carbon nucleophiles
Singh, Kamaljit,Singh, Jasbir,Singh, Harjit
, p. 14273 - 14280 (2007/10/03)
Acid catalysed condensations of various 2 substituted 1,3-oxazinanes 3 and 1,3-oxazolidines 4 with cyclic carbon nucleophiles viz. 5,5-dimethyl-1,3-cyclohexanedione and 1,3-cyclohexanedione furnish xanthene derivatives, whereas a Knoevenagel reaction proceeds with acyclic nucleophiles. In case of 4b and 4c, a unique synthesis of functionalised α-tetralones has emerged. Reactions of mixtures of cyclic and acyclic carbon nucleophiles with 3 provide some functionalised and partially reduced benzopyran derivatives.
On the Reaction of Vinyl Isocyanates with Enamines
Prager, Rolf H.,Were, Stephen T.
, p. 1635 - 1641 (2007/10/02)
Vinyl isocyanate reacts with enamines to give N-vinyl carboxamides which, unlike the more highly substituted analogues, do not cyclize readily to 2-pyridones.
