Multicomponent Reaction to Construct Spirocyclic Oxindoles with a Michael (Triple Michael)/Cyclization Cascade Sequence as the Key Step
作者:Jian Li、Ning Wang、Chunju Li、Xueshun Jia
DOI:10.1002/chem.201104071
日期:2012.7.27
new strategy to access highly unusual tricyclic oxindoles. From a synthetic point of view, this protocol is very interesting considering the high level of complexity reached in one step. The mechanism is thought to proceed by a tripleMichael/cyclization process by using allenoate as a three carbon atom component (3 C). Furthermore, multicomponentreaction with γ‐substituted allenoate also results in
Organocatalyzed [2+2] Cycloaddition Reactions between Quinone Imine Ketals and Allenoates
作者:Teng Liu、Chao Huang、Feixiang Cheng、Chixian He、Fan Wang、Xiang Shen、Yongqin Li、Man Lang、Guijun Li
DOI:10.1055/s-0040-1707292
日期:2021.2
Abstract A new cycloaddition reaction of quinone imine ketals (QIKs), which could be utilized to the construction of functionalized azaspirocyclics under mild conditions, is described. This transformation involved a [2+2] cycloaddition reactionbetween QIKs and allenoates catalyzed by DABCO, and then treatment with 1 N HCl in one-pot. The strategy could provide a practical route to access azetidine-fused
Method of Preparing or Synthesizing Polyazamacrocycle Derivatives
申请人:Cihelnik Simon
公开号:US20080312430A1
公开(公告)日:2008-12-18
The present invention relates to novel processes for the synthesis of polyazamacrocycle derivatives. Furthermore, the present invention relates to novel polyazamacrocycle derivatives as well as novel intermediates for the synthesis of said polyazamacrocycle derivatives.