Ontology type: schema:ScholarlyArticle
2021-05
AUTHORSMaxim R. Demidov, Anastasiya N. Dobrokvashina, Dmitry V. Osipov, Vitaly А. Osyanin, Yuri N. Klimochkin
ABSTRACTThree-component condensation of in situ generated pyridinium acyl methylides with aromatic aldehydes and 4-hydroxythiocoumarin led to a series of 2-acyl-2,3-dihydro-4H-thiochromeno[4,3-b]furan-4-ones. The reaction proceeds diastereoselectively with the formation of trans-isomers and represents a cascade process involving the Knoevenagel condensation, carbo-Michael reaction, and intramolecular nucleophilic substitution. The subsequent redox rearrangement of 2-acyl-2,3-dihydro-4H-thiochromeno[4,3-b]furan-4-ones by the action of Zn and ZrCl4 grants access to 4H,5H-thiochromeno[4,3-b]pyran-5-ones. More... »
PAGES568-573
http://scigraph.springernature.com/pub.10.1007/s10593-021-02944-0
DOIhttp://dx.doi.org/10.1007/s10593-021-02944-0
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