The absolute stereochemical configurations of a series of optically pure alkyneâCo2(CO)5PPh3 complexes and their corresponding cyclopentenones, derived from PausonâKhand reaction with norbornene, have been established; an X-ray crystal structure of an optically pure cyclopentenone has facilitated this study. In turn, this has led to the unambiguous determination of the site of decarbonylation and alkene complexation when such monophosphine complexes are utilised in asymmetric PausonâKhand processes.
一系列光学纯
炔烃-
CO2(CO)5PPh3复合物及其相应的
环戊烯酮的绝对立体
化学构型已经确定,它们是由帕松-坎德反应与
降冰片烯衍生而来;光学纯
环戊烯酮的X射线晶体结构为这项研究提供了便利。反过来,当这种单
磷化合物用于不对称帕松-坎德反应时,这有助于明确确定脱羧和烯烃络合的位置。