What Controls Stereoselectivity and Reactivity in the Synthesis of a <i>trans</i>-Decalin with a Quaternary Chiral Center via the Intramolecular Pauson–Khand Reaction: A Theoretical Study
                                
                                    
                                        作者:Song Liu、Hongjuan Shen、Zhaoyuan Yu、Lili Shi、Zhen Yang、Yu Lan                                    
                                    
                                        DOI:10.1021/om500840q
                                    
                                    
                                        日期:2014.11.24
                                    
                                    The Co-2(CO)(8)-mediated intramolecular PausonKhand reaction is an efficient approach to the trans-decalin subunit with a defined C1 quaternary chiral center. The newly developed density functional theory method M11-L was employed to study the mechanism, reactivity, and stereoselectivity for this reaction. The rate- and stereoselectivity-determining step is the intramolecular alkene insertion into the carboncobalt bond. Insertion of the alkene by the re- and si-face was studied to explain the stereoselectivity. The effects of varying the substituent on the acetylene and the C3 chirality were investigated experimentally and theoretically.