Synchronized stereocontrol of planar chirality by crystallization-induced asymmetric transformation
作者:Nobuhiro Kanomata、Gou Mishima、Jun Onozato
DOI:10.1016/j.tetlet.2008.11.021
日期:2009.1
Synchronized stereocontrol of two planar-chiral units was accomplished by using crystallization-induced asymmetric transformation (CIAT) of cyclophane-type bridged bisnicotinate derivatives 5b and 7. After screening various linkers, (S)-2-amino-1-butanol and (S)-tert-leucinol were found to be the most effective for CIAT of the corresponding bridged bisnicotinate 5b and 7, respectively, whose diastereomeric
通过使用环烷型桥连双烟酸酯衍生物5b和7的结晶诱导不对称转化(CIAT),完成了两个平面手性单元的同步立体控制。筛选了各种接头后,发现(S)-2-氨基-1-丁醇和(S)-叔亮氨酸在相应的桥连双烟酸酯5b和7中对CIAT最有效,其非对映异构体比例最终达到97 %和88%。