The unsaturated ester aldehyde, (E)-3-alkoxycarbonyl-5-phenyl-2,4-dienal, was efficiently dimerized by applying the strain-promoted double-click reaction with sym-dibenzo-1,5-cyclooctadiene-3,7-diyne. The resulting dimerized probe was sequentially reacted first with one peptide molecule and then with a protein or the amino groups on the surface of a live cell through double azaelectrocyclization to achieve highly efficient bioconjugation.
(E)-3- 烷氧羰基-5-苯基-2,4-二烯醛是一种不饱和酯醛,通过与交联-二苯并-
1,5-环辛二烯-3,7-二炔进行应变促进的双击反应,有效地将其二聚化。二聚后的探针先与一个肽分子发生反应,然后通过双氮电环化与蛋白质或活细胞表面的
氨基发生反应,从而实现高效的
生物共轭。