Synthesis of fluorenes and their related compounds from biaryls and Meldrum's acid derivatives
作者:Zhiyan Jiang、Kohei Sekine、Yoichiro Kuninobu
DOI:10.1039/d1cc06212c
日期:——
A new synthetic method for preparing fluorenes from amino group-containing biaryls and Meldrum's acid derivatives was developed. The reaction proceeded without a catalyst and loss of functional groups. The corresponding six- and seven-membered cyclic products were obtained using biaryl ether and ortho-terphenyl as substrates, respectively.
inverse electron demand Diels–Alder reaction (DAinv) and tetrazinesubstitutedfluorophores can exhibit fluorogenic properties. Herein, we report the synthesis of a palette of novel fluorogenic tetrazine dyes derived from widely-used fluorophores that cover the entire emission range from green to far-red. We demonstrate the power of the new fluorogenic probes in fixed and live cell labeling experiments
Direct Transformation of Esters into Heterocyclic Fluorophores
作者:Christian Fischer、Christof Sparr
DOI:10.1002/anie.201711296
日期:2018.2.23
the manifold use of heterocyclic fluorophores, only a fraction of the desired dye diversity can be accessed by contemporary synthetic approaches. Herein, we describe a modular method that converts various carboxylic acid esters directly into a broad spectrum of heteroanthrylium fluorophores. The double addition of heteroatom‐bridged 1,5‐bifunctional organomagnesium reagents to esters leads to the formation
emission and fluorogenicity. However, the applications of heteroatom-substituted rhodamines have been hindered by difficult synthetic routes. Herein, we explored the condensation strategy of diaryl etheranalogues and o-tolualdehyde to synthesize various heteroatom-substituted rhodamines. We found that the electron property and steric effect in the rhodamine 10th position determined the synthetic yield.
A fluorescent dye comprising a xanthene-derived fluorophore having the formula (I) wherein R
1
, R
2
, R
3
, R
4
, R
5
and R
6
are independently selected from H, alkyl, alkoxy, alcohol, ether, alkenyl, alkenoxy, aryl, alkaryl, aralkyl and amido, except that R
1
, R
4
and/or R
5
is not H when bonded to Y, Y
1
or Y
2
, respectively; X is either O
−
or S
−
; and at least one of Y, Y
1
, Y
2
, Y
3
, Y
4
and Y
5
is a group for covalently bonding the dye, optionally through. the use of a coupling agent, to a target molecule, and is otherwise H. The dye may be covalently attached to a target molecule to form a complex, and the dye and/or complex finds use in cell analysis techniques, particularly pH measurement and analysis of kinetics of migration.