Heterocyclic compounds and their preparation and use
申请人:——
公开号:US20020115697A1
公开(公告)日:2002-08-22
The present invention relates to therapeutically active azabicyclic compounds, a method of preparing the same and to pharmaceutical or veterinary compositions comprising the compounds. The novel compounds are useful in treating a disease in the central nervous system caused by malfunctioning of the muscarinic cholinergic system.
Ti-catalyzed regioselective ring-opening alkynylation of epoxides with haloalkynes
作者:Di Zhang、Hao Li、Dong Yi、Shijing Tu、Zhongyu Qi、Siping Wei、Qiang Fu、Haiyan Fu、Xi Du
DOI:10.1016/j.tetlet.2021.153461
日期:2021.11
Ti-catalyzed ring-opening alkynylation of epoxides with haloalkynes has been achieved, allowing an efficient and regioselective entry to various propargylic alcohols in moderate to good yields. The developed protocol features extremely mild reaction conditions, broad substrate scope, varied functional group compatibility, and chemospecificity in the rearrangements of epoxides to aldehydes.
已经实现了环氧化物与卤代炔烃的 Ti 催化开环炔基化,允许以中等至良好的产率有效和区域选择性地进入各种炔丙醇。开发的协议具有极其温和的反应条件、广泛的底物范围、不同的官能团兼容性以及环氧化物重排为醛的化学特异性。
EP0900217A4
申请人:——
公开号:EP0900217A4
公开(公告)日:2001-05-23
HETEROCYCLIC COMPOUNDS AND THEIR PREPARATION AND USE