Active pyrylium intermediates are in situ generated by a Rh-catalyzed vinylic C–H annulation reaction between exocyclic α,β-enones and alkynes, which undergo a base-promoted rearrangement via 1,5-H shift to form 1H-benzo[f]chromenederivatives.
活性吡啶鎓中间体是通过环外α,β-烯酮和炔烃之间的Rh催化乙烯基C–H环合反应原位生成的,环化反应通过1,5-H移位进行碱促进的重排,形成1 H-苯并[ f ] chromene衍生物。
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n
</sup>Bu<sub>4</sub>NPF<sub>6</sub> promoted regioselective cascade synthesis of functionally embellished naphthofurans under acid, metal & solvent free conditions
作者:Abhishek Pareek、Ravikrishna Dada、Monika Rana、Anuj K. Sharma、Srinivasarao Yaragorla
DOI:10.1039/c6ra17411f
日期:——
n Bu4NPF6 mediated highly regioselective synthesis of functionally embellished naphthofurans has been achieved from easily available naphthols and propargyl alcohols through a cascade benzylation, oxacyclisation (5-exo dig) and isomerization undersolventfreeconditions. The reaction works in a short time through dibenzyl ether formation followed by the decomposition to the carbocation to furnish
Yaragorla, Srinivasarao; Saini, Pyare Lal, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2016, vol. 55B, # 8, p. 983 - 988
作者:Yaragorla, Srinivasarao、Saini, Pyare Lal
DOI:——
日期:——
Oxidative rearrangement of 4H-chromenes to 2-aroylbenzofurans in the presence of selenium dioxide
作者:Maxim R. Demidov、Marina Yu. Lapshina、Dmitry V. Osipov、Vitaly A. Osyanin、Yuri N. Klimochkin
DOI:10.1007/s10593-017-2169-7
日期:2017.9
A new method is proposed for the preparation of 2-aroylbenzofurans and 2-aroylnaphtho[2,1-b]furans via oxidative rearrangement of 2,4-diaryl-4Н-chromenes and 1,3-diaryl-1Н-benzo[f]chromenes in the presence of selenium dioxide.
提出了一种新的制备2-芳基苯并呋喃和2-芳基萘并[2,1- b ]呋喃的新方法,该方法通过氧化2,4-二芳基-4Н-色烯和1,3-二芳基-1Н-苯并[]在二氧化硒存在下的f ]色酮。
Synthesis, in vitro and in vivo evaluation of 2-aryl-4H-chromene and 3-aryl-1H-benzo[f]chromene derivatives as novel α-glucosidase inhibitors
作者:Alexander A. Spasov、Denis A. Babkov、Dmitry V. Osipov、Vladlen G. Klochkov、Diana R. Prilepskaya、Maxim R. Demidov、Vitaly A. Osyanin、Yuri N. Klimochkin
DOI:10.1016/j.bmcl.2018.10.018
日期:2019.1
report a study of novel arylchromene derivatives as analogs of naturally occurring flavonoids with prominent α-glucosidase inhibitory properties. Novel inhibitors were identified via simple stepwise in silico screening, efficient synthesis, and biological evaluation. It is shown that 2-aryl-4H-chromene core retains pharmacophore properties while being readily available synthetically. A lead compound