Ni-Catalyzed Intramolecular Cycloaddition of Methylenecyclopropanes to Alkynes
摘要:
Ni-catalyzed intramolecular cycloaddition of methylenecyclopropanes (MCPs) to arkylalkynes via proximal bond cleavage is reported. The reaction provides a facile route for the preparation of cyclopenta[a]indene derivatives.
The Chemical Behavior of 3,4-Benzocycloocten-1,5-diyne
作者:Christian Werner、Henning Hopf、Jörg Grunenberg、Peter G. Jones
DOI:10.1002/ejoc.200901371
日期:2010.7
The title compound 3,4-benzocycloocten-1,5-diyne (1) is a highly reactive hydrocarbon that has been shown to undergo addition reactions with tetraphenyl-cyclopentadienone(tetracyclone) to the 2:1 adduct 6, with octacarbonyldicobalt to the bis metal complex 7, with lithium aluminium hydride to the bis diene 9, and with various electrophilic reagents. In these latter cases cationic intermediates are