Intramolecular ene reaction of 1,6-fullerenynes: a new synthesis of allenes.
[Structure: see text] Thermal treatment of 1,6-fullerenynes bearing an alkyl group on the terminal carbon of the alkyne moiety leads quantitatively to new allenes through a reaction mechanism involving an intramolecular ene process. This reaction outcome is in contrast to that recently found for free terminal alkynes which form cyclobutene derivatives through a [2+2] cyclization mechanism.
Altable
Margarita
M
Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense, E-28040 Madrid, Spain.
Filippone
Salvatore
S
Martín-Domenech
Angel
A
Güell
Mireia
M
Solà
Miquel
M
Martín
Nazario
N