Jeng‐Liang Han, C. Ong
Feb 7, 2005
Citations
0
Influential Citations
2
Citations
Journal
Tetrahedron
Abstract
Abstract Tricarbonyl[(1-4-η)-2-methoxy-5-methylene-cyclohexa-1,3-diene]iron ( 1a ) and tricarbonyl[(1-4-η)-2-methoxy-5-isopropylene-cyclohexa-1,3-diene]iron ( 1b ) complexes are unstable 4-vinylidene cyclohexanone equivalents and these react regio- and stereoselectively with carbenes and metallocarbenes to give spiro[2,5]octane ring system. The (2+1) cycloaddition reaction provides a rapid entry into spiro[2,5]octane ring system. In cases where the carbene and metallocarbene contain a good bulky leaving group or an electron-withdrawing group, the cyclopropane ring-opening products are obtained.