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2H-1-benzopyran; fundamental unit of the tocopherolquinones.
See also: chroman, chromanol, chromenol.
References in periodicals archive ?
Miroestrol is a chromene derivative with a chemical structure similar to an estrogenic hormone, estradiol (Terenius 1968) and is reported to exhibit an estrogenic-like effect through binding to intracellular estrogen receptor a (ER-[alpha]) and ER-[beta], which function as ligand-activated transcription factors (Matsumura et al.
The condensation of 1 with diethylmalonate in boiling benzene in the presence of diethyl sodio-malonate as basic condensing agent afforded the chromene derivative (10).
Reaction of 1 with ethyl cyanoacetate in the presence of catalytic amount of piperidine furnished the chromene derivative (12), while its reaction with ethyl cyanoacetate in the presence of ammonium acetate gave the quinoline derivative (13).
Jabbarpour, A Facile Multi Component Synthesis of Some Functionalized Chromenes and Spiroindole Derivatives Using Dabco as an Efficient Catalyst, J.
Three highly oxygenated chromene derivatives, oxi-rapentyns B (56), C (57) and D (58) were isolated from the lipophilic extract of marine-derived fungus Isaria felina KMM 4639 (Smetanina et al.
Summary: Chromene and spirocyclic 2-oxindole derivatives were readily synthesized in good yields via a one-pot three-component reaction involving Knoevenagel condensation of aromatic aldehyde or isatin with an active methylene reagent then the intermediate was reacted with another different active methylene reagent via a DABCO-catalysed Michael addition to yield the main products.
Under the above mentioned conditions, a variety of the desired chromene products 6a-d were obtained in good yields (Scheme-1 and Table-1).
Table-1: DABCO catalyzed synthesis of 5-oxo- 5,6,7,8- tetrahydro-4H- chromene 5a-j and 5- oxo-4,5- dihydropyrano- [3,2-c]- chromene derivatives, 6a-d
A new antifungal chromene and a related dichromene from Hypericum revolutum.
Decosterd L, Stoeckli-Evan H, Msonthi JD, Hostettmann K (1986) A new antifungal chromene and a related dichromene from Hypericum revolutum.
Chemical studies carried out on Brazilian Piperaceae species have revealed the occurrence of pyrones, lignoids and chromenes besides various amides bearing isobutyl, pyrrolidine, dihydropyridone and piperidine moieties (Parmar et al.
The chromenes could be responsible for the antiproliferative activity of both these fractions.