Sedenkova KN, Averina EB, Grishin YK, Kutateladze AG, Rybakov VB, Kuznetsova TS, Zefirov NS. Three-component heterocyclization of gem-bromofluorocyclopropanes with NOBF4: access to 4-fluoropyrimidine N-oxides.
J Org Chem 2012;
77:9893-9. [PMID:
23078111 DOI:
10.1021/jo301880m]
[Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Novel three-component heterocyclization involving gem-bromofluorocyclopropanes, nitrosyl tetrafluoroborate, and a molecule of the solvent (nitrile) yielding previously unknown fluorinated pyrimidine N-oxides is described. A two-step synthetic approach to 4-fluoropyrimidine N-oxides from alkenes under mild conditions is developed using this reaction. Mechanistic aspects of the heterocyclization are discussed.
Collapse