Nucleophilic substitutions in the isoindole series as a valuable tool to synthesize derivatives with antitumor activity
摘要:
A novel synthetic approach to the synthesis of 3-substituted isoindoles through nucleophilic substitution of 3-halo derivatives by charged carbon, and neutral nitrogen, oxygen, and sulfur nucleophiles, assisted by a 1-acyl group, is reported. Aryl-thio-isoindoles, obtained through a direct nucleophilic substitution with sulfur nucleophiles, showed cytotoxic activity, with GI(50) values from micromolar to sub-micromolar concentrations, against the total number of cell lines investigated. (C) 2011 Elsevier Ltd. All rights reserved.
asymmetrical benzo-fused BODIPYdyes were synthesized from the Sonogashira coupling and nucleophilic substitution reactions on the 3-halogenated benzo-fused BODIPY, generated from readily available 3-halogeno-1-formylisoindoles in a two-step synthetic procedure. This novel BODIPY platform provides an easy path for the linking of BODIPY fluorophore to various desired functionalities as demonstrated in this
band gaps of the dye. Among the 23 isoindole BODIPY dyes synthesized, solvent-dependent fluorescence emission and lifetime decay were only observed for those containing a 3-methyl substituent on the uncoordinated pyrrole ring, whereas little variation in the fluorescence intensity was observed for the rest of the dyes upon changing the polarity of the solvent. These resultant dyes can be further functionalized
Approaches to the stepwise synthesis of benzoporphyrins and phthalocyanines. Part 1. Synthesis of opp-dibenzoporphyrins (dibenzo[g,q]porphyrins)
作者:Raymond Bonnett、Kimberly A. McManus
DOI:10.1039/p19960002461
日期:——
A stepwise synthesis of the opp-dibenzoporphyrin (dibenzo[g,q]porphyrin) system involving isoindole precursors is described. 3-Halogeno-1-formylisoindoles are condensed with various α-unsubstituted pyrroles to give the corresponding benzopyrromethene hydrobromides. Thermal self-condensation of such compounds bearing an α-methyl group gives the corresponding opp-dibenzoporphyrin derivatives in low to