Bu3SnH mediated oxidative radical cyclisation onto imidazoles and pyrroles
A new protocol using radical cyclisation has been developed for the synthesis of [1,2-c]-fused imidazoles and [1,2-a]-fused pyrroles. The intermediate nucleophilic N-alkyl radicals, generated using Bu3SnH from N- (ω-bromoalkyl) or N-[ω-(phenylselanyl)alkyl] imidazoles and pyrroles, undergo regio-selective radical cyclisalion onto the azole rings followed by oxidative re-aromatisation.
Aldabbagh, Fawaz,Russell Bowman,Mann, Emma,Slawin, Alexandra M.Z.
p. 8111 - 8128
(2007/10/03)
Oxidative radical cyclisations onto imidazoles and pyrroles using Bu3SnH
Oxidative radical cyclisation using Bu3SnH has been used for the synthesis of [1,2-c]-fused imidazoles and [1,2-a]-fused pyrroles from imidazolecarbaldehydes and acylpyrroles respectively. The intermediate nucleophilic N-alkyl radicals cyclise onto imidazole and pyrrole rings followed by oxidative re-aromatisation.
Aldabbagh, Fawaz,Bowman, W. Russell,Mann, Emma
p. 7937 - 7940
(2007/10/03)
SYNTHESE D'ACETOACETALDEHYDES MONO- ET DI-SUBSTITUES PAR DES CHAINES FONCTIONNALISEES
These synthons, which are useful in the synthesis of indole alkaloids, were prepared through alkylation of enone 4 and further ozonolysis, after eventual protection in the form of dioxolane derivatives.
Cartier, Dominique,Levy, Jean
p. 5295 - 5304
(2007/10/02)
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