Multinuclear zinc bisamidinate catalyzed asymmetric alkylation of α-ketoesters and its unique chemoselectivity
作者:Masahiro Yamanaka、Masamitsu Inaba、Ryo Gotoh、Yoshiyuki Ueki、Kenichiro Matsui
DOI:10.1039/c7cc01736g
日期:——
steric tuning of two amidinate units as well as multiple coordination on the Zn atoms play a key role in achieving high enantioselectivity (up to 98% ee) and unique chemoselectivity. The present catalyst exhibited the preferential alkylation of α-ketoesters even in the presence of aldehydes.
已经开发了多核Zn-双酰胺基锌催化的Et2Zn对α-酮酸酯的对映选择性加成。两个a基单元的空间调谐以及对Zn原子的多重配位在实现高对映选择性(高达98%ee)和独特的化学选择性方面起着关键作用。本发明的催化剂即使在醛存在下也表现出α-酮酯的优先烷基化。