141075-45-8Relevant academic research and scientific papers
Preparation of pyran derivatives promoted by FeCl3· 6H2O in ionic liquid
Zhang, Xinying,Lv, Quanjian,Fan, Xuesen,Qu, Guirong
, p. 357 - 360 (2008)
The condensation reaction of chaicone and 1,3-cyclohexanedione was smoothly carried out in [bmim][BF4] with catalysis by FeCI 3·6H2O. A series of substituted pyrans were obtained by this reaction, in high yields under mild conditions through a simple operational procedure. In addition, the ionic liquid together with the catalyst used can be conveniently recovered and efficiently reused.
Two-Step Sequence Multicomponent Synthesis/Reductive Rearrangement of 2-Acyl-2,3-dihydrofurans for Modular Assembly of Annulated 4H-Pyrans
Demidov, Maxim R.,Korol'kov, Konstantin A.,Osipov, Dmitry V.,Osyanin, Vitaly A.
, p. 3737 - 3743 (2021)
A variety of trans-2-acyl-2,3-dihydrofurans have been assembled from readily available structurally diverse precursors and then rearranged into a series of annulated 4H-pyrans by the action of Sm/TMSCl or Zn/ZrCl4 redox systems. Present synthetic sequence is claimed as a modular approach to hetero- and carbon-fused 4H-pyrans. The rearrangement involves the SET reduction of carbonyl group to carbene followed by rare type of [1,2]-aroxyl shift. Synthetic toolbar was enriched with the use of the Zn/ZrCl4 redox system. (Figure presented.).
Solvent-free synthesis of 5-oxo-5,6,7,8-tetrahydro-4H-benzo-[b]-pyran derivatives under microwave irradiation
Hu, Xue Yuan,Fan, Xue Sen,Zhang, Xin Ying,Qu, Gui Rong,Li, Yan Zhen
, p. 1054 - 1057 (2007/10/03)
Several benzo-[b]-pyran derivatives were prepared via microwave irradiation under solvent-free conditions in the presence of InCl3· 4H2O. The advantages of this method include simple operational process, environmental benignancy, and
An efficient and simple one-pot synthesis of 2,4-diaryl-7,7-dimethyl-5-oxo-5,6,7,8-tetrahydro-4H-1-benzopyrans
Ahluwalia, V K,Kiran, Sushma,Aggarwal, R,Arora, K K
, p. 1095 - 1097 (2007/10/02)
A convenient and efficient one-pot synthesis of the title 4H-benzopyrans (8-13) has been achieved by the condensation of 5,5-dimethyl-1,3-cyclohexanedione with different chalcones.
