申请人:The University of Tokyo
公开号:US20200087516A1
公开(公告)日:2020-03-19
[Problem]
A problem addressed by the present invention is to provide a novel fluorescent probe having excellent tissue permeability that is capable of detecting the peptidase activity expressed at a high level in cancer cells and the like as a response of long-wavelength red fluorescence.
[Solution]
A compound represented by formula (I) or a salt thereof:
[In the formula, A represents a ring structure selected from the group consisting of a thiophene ring, a cyclopentene ring, a cyclopentadiene ring, and a furan ring;
X represents a C
0
-C
3
alkylene group;
Y represents O, S, C(═O)O, or NH,
Z represents O, C(R
a
) (R
b
), Si(R
a
) (R
b
), Ge(R
a
) (R
b
), Sn(R
a
) (R
b
), Se, P(R
c
), or P(R
c
) (═O) (where R
a
and R
b
each independently represent a hydrogen atom or an alkyl group, and R
c
represents a hydrogen atom, an alkyl group, or an aryl group);
R
1
and R
2
each independently represent from one to three of the same or different substituents selected from the group consisting of a hydrogen atom, a hydroxyl group, a halogen atom, and an alkyl group, a sulfo group, a carboxyl group, an ester group, an amide group, and an azide group each of which may be substituted;
R
3
represents an acyl residue derived from an amino acid (where the acyl residue is a residue obtained by removing an OH group from a carboxyl group of the amino acid);
R
4
and R
5
each independently represent a hydrogen atom or an alkyl group (where when R
4
or R
5
is an alkyl group, the R
4
or R
5
, together with R
2
, may form a ring structure comprising a nitrogen atom to which R
4
and R
5
are bonded).]
本发明解决的问题是提供一种具有出色的组织渗透性的新型荧光探针,能够检测在癌细胞等高水平表达的肽酶活性,并以长波长红色荧光作为响应。该解决方案是由下式或其盐所表示的化合物:
[在该式中,A代表从噻吩环、环戊烯环、环戊二烯环和呋喃环等组成的环结构;X代表C0-C3烷基基团;Y代表O、S、C(═O)O或NH;Z代表O、C(Ra)(Rb)、Si(Ra)(Rb)、Ge(Ra)(Rb)、Sn(Ra)(Rb)、Se、P(Rc)或P(Rc)(═O)(其中Ra和Rb各自独立地代表氢原子或烷基基团,Rc代表氢原子、烷基基团或芳基);R1和R2各自独立地代表从同一种或不同的取代基组成的羟基、卤原子、烷基基团、磺基、羧基、酯基、酰胺基和叠氮基中的一种至三种取代基(每种取代基可以被取代);R3代表由氨基酸衍生的酰基残基(其中酰基残基是通过从氨基酸的羧基中去除一个OH基团而得到的残基);R4和R5各自独立地代表氢原子或烷基基团(当R4或R5为烷基基团时,R4或R5与R2一起可以形成一个含有氮原子的环结构,其中R4和R5与R2相结合)。]