Donor–Acceptor Cyclopropane Ring Opening with 6‑Amino-1,3-dimethyluracil and Its Use in Pyrimido[4,5‑b]azepines Synthesis

A scandium trifluoromethanesulfonate-catalyzed reaction of donor–acceptor cyclopropanes with 6-amino-1,3-dimethyluracil was found to proceed as three-membered ring opening via nucleophilic attack of the C(5) atom of an ambident nucleophile serving as an enamine equivalent. It was shown that, under b...

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Veröffentlicht in:Journal of organic chemistry 2021-09, Vol.86 (17), p.12300-12308
Hauptverfasser: Vartanova, Anna E, Levina, Irina I, Rybakov, Victor B, Ivanova, Olga A, Trushkov, Igor V
Format: Artikel
Sprache:eng
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Zusammenfassung:A scandium trifluoromethanesulfonate-catalyzed reaction of donor–acceptor cyclopropanes with 6-amino-1,3-dimethyluracil was found to proceed as three-membered ring opening via nucleophilic attack of the C(5) atom of an ambident nucleophile serving as an enamine equivalent. It was shown that, under basic conditions, the obtained products underwent cyclization to 6,7-dihydro-1H-pyrimido­[4,5-b]­azepine-2,4,8-triones, an interesting subclass of nucleobase analogues.
ISSN:0022-3263
1520-6904
DOI:10.1021/acs.joc.1c01064