申请人:Molecular Probes, Inc.
公开号:US05338854A1
公开(公告)日:1994-08-16
This invention relates to improved fluorescent fatty acid analogs derived from dipyrrometheneboron difluoride ("BDY") dyes that absorb light at wavelengths longer than 480 nm. The BDY fluorophore or a derivative thereof is incorporated at various locations along the alkyl portion of the fatty acid ("BDY fatty acid"). The general formula of a BDY fatty acid is as follows: ##STR1## wherein at least one of the substituents R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 is a carboxylic acid terminated alkyl residue containing 5 to 22 carbon atoms. The remaining substituents, singly or in any combination, are: additional alkyl or arylalkyl residues containing 1 to 16 aliphatic carbon atoms, or aryl or heteroaryl residues, or hydrogen. Symmetrically substituted BDY fluorophores are conveniently synthesized from a single pyrrole precursor in a "one-pot" reaction. Alternatively, BDY fatty acids are synthesized from two different pyrrole precursors. The combination of fatty acids with these electrically neutral, photostable, strongly colored, and mostly highly fluorescent BDY dyes having relatively narrow absorption and emission spectra results in an improved fluorescent probe particularly useful for studying natural and synthetic lipid membranes and related areas.
这项发明涉及改进的荧光脂肪酸类似物,源自二吡咯甲硼二氟化物("BDY")染料,其吸收波长大于480纳米。BDY荧光团或其衍生物被合并到脂肪酸的烷基部分的不同位置上("BDY脂肪酸")。BDY脂肪酸的一般公式如下:其中R.sub.1、R.sub.2、R.sub.3、R.sub.4、R.sub.5、R.sub.6和R.sub.7中至少一个是含有5至22个碳原子的羧酸终止的烷基残基。其余的取代基,单独或组合,是:额外的含有1至16个脂肪碳原子的烷基或芳基烷基残基,或芳基或杂原芳基残基,或氢。对称取代的BDY荧光团可以方便地从单个吡咯前体在“一锅法”反应中合成。另外,BDY脂肪酸可以从两种不同的吡咯前体合成。将脂肪酸与这些电中性、光稳定、强烈着色和大多高荧光的BDY染料结合,其吸收和发射光谱相对较窄,结果产生了一种改进的荧光探针,特别适用于研究天然和合成脂质膜及相关领域。