H. Kagoshima et al., A NEW CYCLOISOMERIZATION REACTION - FORMATION OF 8-MEMBERED-RING COMPOUNDS FROM 3-SILA 1,7-ENYNES, Organometallics, 15(26), 1996, pp. 5439-5441
An intramolecular cycloisomerization occurred upon, adding a tertiary
amine N-oxide to alkyne-cobalt complexes, derived from 3-sila 1,7-enyn
es and dicobalt octacarbonyl. As a result, eight-membered cyclic dieny
lsilanes were obtained by a regioselective insertion of the alkynyl gr
oup into the C(1)-H bond.