Novel compounds include the group
R₇-SO₂-S-C(R₃)₂-C(R₄)₂-(CH₂)n-
Either one such group is bonded to R₆ or one or more such groups are bonded to a ligand or receptor, whereupon R₇ may be replaced by a radical derived by removal of the sulfhydryl group from luciferase.
Either R₃ is H, CH₃ or C₂H₅ and R₄ is H, CH₃ or C₂H₅ or -C(R₃)₂-C(R₄)₂ - is C4-6 alkylene or 1,4-phenylene;
R₆ is -COOH, -COOsuccinimide, -COCl, -COBr, Cl, Br, SCN, NH₂, CN 4-cyanophenyl, -C(OCH₃)=NH.HCl or -(1,4-phenylene)-C(OCH₃)=NH.HCl;
R₇ is C1-6 alkyl, phenyl, fluorophenyl, nitrophenyl, (C1-4 alkyl)phenyl, 2-pyridyl or 4-pyridyl; and n is 0 or an integer of 1 to 15;
with the proviso that the compound is not CH₃-SO₂-S-CH₂-CH₂-NH₂ or C₆H₅-SO₂-S-CH₂-CH₂-NH₂.
新型化合物包括以下基团
R₇-SO₂-S-C(R₃)₂-C(R₄)₂-(CH₂)n-
一个这样的基团与 R₆ 键合,或者一个或多个这样的基团与
配体或受体键合,此时 R₇ 可被去掉
荧光素酶中的巯基而得到的基团取代。
R₃ 是 H、CH₃ 或 C₂H₅ 和 R₄ 是 H、CH₃ 或 C₂H₅ 或 -C(R₃)₂-C(R₄)₂ - 是 C4-6 亚烷基或 1,4-亚苯基;
R₆是-COOH、-COO琥珀
酰亚胺、-COCl、-COBr、Cl、Br、SCN、NH₂、CN 4-
氰基苯基、-C(OCH₃)=NH.HCl 或-(1,4-苯基)-C(OCH₃)=NH.HCl;
R₇ 是 C1-6 烷基、苯基、
氟苯基、
硝基苯基、(C1-4 烷基)苯基、2-
吡啶基或 4-
吡啶基;以及 n 是 0 或 1 至 15 的整数;
但该化合物不是 CH₃-SO₂-S-CH₂-CH₂-NH₂ 或 C₆H₅-SO₂-S-CH₂-CH₂-NH₂。