Enantioselective Sensing of Amines Based on [1 + 1]-, [2 + 2]-, and [1 + 2]-Condensation with Fluxional Arylacetylene-Derived Dialdehydes
作者:Daniel P. Iwaniuk、Christian Wolf
DOI:10.1021/ol200574x
日期:2011.5.20
Four induced circular dichroism (ICD) probes exhibiting a stereodynamic arylacetylene framework and terminal aldehyde units have been prepared. The CD silent sensors generate a strong chlroptical response to substrate-controlled induction of axial chirality upon selective [1 + 1]-, [2 + 2]-, and [1 + 2]-condensation. The Intense Cotton effects can be exploited for In situ ICD analysis of the absolute configuration and ee of a wide range of amines.
Synthesis of Substituted Styrenes and 3-Vinylphenols Using Ruthenium-Catalyzed Ring-Closing Enyne Metathesis
The synthesis of substituted styrenes 3 and 3-vinylphenols 9 was achieved by ring-closing enyne metathesis (RCEM)/dehydration of 7 and RCEM/tautomerization of 8, respectively. Those methods provide selective access to unique aromatic compounds and solve the problem of regioisomer formation.