Investigation of the Diels-Alder cycloadditions of 2(H)-1,4-oxazin-2-ones.
[Reaction: see text]. A variety of 5-chloro-2(H)-1,4-oxazin-2-ones bearing a range of substituents at their 3- and 6-positions undergo Diels-Alder cycloaddition as a 2-azadiene component with electron-rich, electron-deficient, and electron-neutral dienophiles. These reactions proceed with moderate regio- and stereoselectivity to afford relatively stable and readily isolable bridged bicyclic lactone cycloadducts. Chemical manipulation of these cycloadducts affords highly substituted and functionally rich piperidines. The regio- and stereochemical preferences of the cycloadditions of 5-chloro-2(H)-1,4-oxazin-2-ones are investigated computationally using density functional theory (B3LYP/6-31G).
Afarinkia
Kamyar
K
Department of Chemistry, King's College, Strand, London WC2R 2LS, UK. kamyar.afarinkia@kcl.ac.uk
Bahar
Akmal
A
Bearpark
Michael J
MJ
Garcia-Ramos
Yésica
Y
Ruggiero
Andrea
A
Neuss
Judi
J
Vyas
Maushami
M