Asymmetric Deoxygenative Alkynylation of Tertiary Amides Enabled by Iridium/Copper Bimetallic Relay Catalysis
作者:Zhaokun Li、Feng Zhao、Wei Ou、Pei‐Qiang Huang、Xiaoming Wang
DOI:10.1002/anie.202111029
日期:2021.12.13
An Ir/Cu bimetallicrelaycatalysis was developed to achieve the challenging asymmetricdeoxygenativealkynylation of inert amides under mild conditions, affording a series of synthetically important chiral propargylamines in high yields with good to excellent enantioselectivities.
Unique spirocyclopiperazinium salt I: synthesis and structure–Activity relationship of spirocyclopiperazinium salts as analgesics
作者:Feng-Li Gao、Xin Wang、Hong-Mei Zhang、Tie-Ming Cheng、Run-Tao Li
DOI:10.1016/s0960-894x(03)00177-x
日期:2003.5
spirocyclopiperazinium derivatives 7a-n and 10a-h were synthesized and evaluated for their in vivo analgesic and sedative activities. Compounds 7f and 10c were discovered to exhibit excellent analgesic activity. Structure-activityrelationships revealed that anion of the quaternary salt affected the analgesic and sedative activity significantly; the allyl group is a most effective group among the compounds