Preparation, properties, and X-ray structures of 5,5 '-bi(8-aminoquinoxalyl)s: novel Wurster-type electron donors with a heterobiaryl skeleton

作者：Suzuki T^*; Saito M; Kawai H; Fujiwara K; Tsuji T

来源：Tetrahedron Letters, 2004, 45(2): 329-333.

DOI：10.1016/j.tetlet.2003.10.151

• electron donor
• benzidine
• biquinoxalyl
• biaryl
• redox system
• through-bond interaction
• through-space interaction
• metal coordination

The title electron donors were prepared by the double condensation reactions of 2,2',3,3'-tetraamino-4,4'-bis(l-pyrrolidinyl)biphenyl with 1,2-diketones. They adopt twisted conformations in crystal, yet the reversible two-stage one-electron oxidation process suggests the planar geometries for the oxidized species. Depending on the nature of substituents on the pyrazine ring, this pi-system can be endowed additional features such as chiroptical properties or metal coordination ability.

• 出版日期2004-1-5