Enantioselective Alkynylation of Pyrazole-4,5-diones with Terminal Alkynes Catalyzed by Copper/PyBisulidine
作者:Yu Chai、Peng Chen、Ruoran Wu、Junyu Zhou、Jianhua Ou、Yan Min、Haoting Wang、Dong Zhang、Hui Zhou、Yan Liu、Jing Zhou
DOI:10.1021/acs.joc.3c01338
日期:2023.10.6
zed enantioselective alkynylation of electrophilic pyrazole-4,5-dione with terminal alkynes has been developed. Chiral tertiary propargylic alcohols bearing the pyrazolone motif were prepared with yields (up to 99%) and enantioselectivities (up to 99% ee). The prominent feature of this protocol includes its mild reaction conditions and good stereoselectivities. The nonlinear effect study showed that
已开发出铜/PyBisulidine 催化的亲电子吡唑-4,5-二酮与末端炔烃的对映选择性炔基化反应。制备了带有吡唑啉酮基序的手性叔炔醇,其收率(高达 99%)和对映选择性(高达 99% ee)。该方案的显着特点是反应条件温和、立体选择性好。非线性效应研究表明,催化活性物质是单体催化剂,过量的铜通过π-系统活化炔烃。