2-benzylidene-1,3-indandione derivatives 5a–5j were synthesized as neutral fluorescence probe candidates for identification of amyloid. Among these compounds, only compound 2-(2-hydroxybenzylidene)-1,3-indandione 5a was selected for further examination, because its fluorescence intensity showed the significant increasing upon interaction with amyloid aggregates. The compound 5a was compared to standard and conventional
Chemo- and Diastereoselective Michael–Michael-Acetalization Cascade for the Synthesis of 1,3-Indandione-Fused Spiro[4.5]decan Scaffolds
作者:Shu-Mei Yang、Yi-Ling Tsai、Ganapuram Madhusudhan Reddy、Lennart Möhlmann、Wenwei Lin
DOI:10.1021/acs.joc.7b01415
日期:2017.9.1
A novel, organobase-catalyzed and highly chemoselective Michael–Michael-acetalization cascade is presented for the efficient synthesis of spiro-indandione skeletons. Following this very simple protocol, a broad range of products was obtained in good yields with excellent diastereocontrol. The role of steric factors in the acetalization step was evaluated.