Tricarbonyl iron complexes of 1,1,3 and 1,1,2,3,-substituted 1,3-dienes are decomplexed under mild conditions by aluminium halides to conjugated cyclopentenones. This is illustrated for the cyclic substitution patterns A and C, leading to spirocyclic and cyclocondensed cyclopentenones. Optically active compounds are obtained in high optical purity from complexed optically active ligands, the cyclocarbonylation
1,1,3和1,1,2,3,-取代的1,3-二烯的三
羰基铁配合物在温和的条件下被卤化铝分解为共轭的
环戊烯酮。对于环状取代模式A和C说明了这一点,导致了螺环和环缩合的
环戊烯酮。光学活性化合物是由络合的光学活性
配体以高光学纯度获得的,环羰基化反应是立体特异性的。