Highly Selective and High-Yielding Rotaxane Synthesis via Aminolysis of Prerotaxanes Consisting of a Ring Component and a Stopper Unit
                                
                                    
                                        作者:Keiji Hirose、Keiji Nishihara、Naoki Harada、Yamato Nakamura、Daisuke Masuda、Masami Araki、Yoshito Tobe                                    
                                    
                                        DOI:10.1021/ol070999w
                                    
                                    
                                        日期:2007.8.1
                                    
                                    A highly rotaxane-selective synthesis via aminolysis of prerotaxanes, which were composed of a phenolic pseudo-crown ether as a ring component and a bulky stopper unit, was developed. The best result was obtained in the case of aminolysis of 3b with 3,5-dimethylbenzylamine which proceeded quantitatively with ca. 100% rotaxane selectivity forming the corresponding rotaxane 5b. The rotaxanes were formed by kinetically controlled attack of the amine from the backside of the ring component of the prerotaxanes.