An organocatalytic multi-molecular cascade reaction for the synthesis of acetate functionalized 1,4-dihydropyridines
作者:Deqing Hu、Yunyun Liu、Jie-Ping Wan
DOI:10.1016/j.tet.2015.06.101
日期:2015.9
An organocatalytic cascade reaction involving the incorporation of alkyl propiolates and primary amines has been realized for the facile synthesis of 1,4-dihydropyridines (1,4-DHPs) bearing a C4 acetate fragment. This method allows rapid and atom economical generation of N-aryl, N-alkyl, and NH 1,4-DHPs with moderate to excellent yields. (C) 2015 Elsevier Ltd. All rights reserved.
Selective fluorescent sensor for mercury ions in aqueous media using a 1,4-dihydropyridine derivative
hydrolysis of the triester. These DHP derivatives are readily soluble in aqueous media buffered at pH 8.0 and the solutions give blue fluorescent signals with quantum yields of 7–23%. One of these compounds, bearing a p-methoxyphenyl N-substituted group, shows specific fluorescent quenching with the mercuricion (Hg2+). The fluorescent signal of the DHP derivative decays over a period of minutes to hours
The reactions of Boc-β-amido- and β-amino acrylates, in which the CC possesses both nucleophilic and electrophilic sites, were investigated under acidic conditions. The trifluoroacetic-acid induced cyclization of the β-amido acrylates to the corresponding oxazolidin-2-ones involves a rarely seen nucleophilic attack of the carbamate carbonyl group. The cyclotrimerization of β-amino acrylates to N-substituted