A chemiluminescent compound possessing an aryl ester, thioester or amide of a carboxylic acid substituted heterocyclic ring or ring system that is susceptible to chemical attack to dissociate the heterocyclic ring to a transient compound. The heterocyclic ring is ring carbon-bonded to the carbonyl of the ester, thioester or amide moiety and possesses a heteroatom in an oxidation state that allows chemiluminescence by dissociating a compound at the carbon bonded to the carbonyl that decays to produce chemiluminescence. The heterocyclic ring or ring sustem contains bonded to it through an organic moiety, a functional group that is functionally reactive with an active hydrogen containing compound. The aryl ring is a ring or ring system that is ring carbon-bonded to the oxygen, sulfur or nitrogen of the ester, thioester or amide, as the case may be, and contains substituents on a six-member ring that act to sterically and electronically hinder hydrolysis of the ester, thioester or amide linkage. Optionally, there is an electron donating substituent in a peri position on the heterocyclic ring system. The substituents on the aryl ring comprise at least one ortho electron donating substitution that with the peri substitution comprises at least two substituents adjacent to the ester, thioester or amide linkage that are electron donors; at least one meta or para substituent on the aryl ring that possesses a .sigma..sub.p value greater than 0 and less than 1. Also described are assays and assay kits that employ such label compounds.
一种
化学发光化合物,具有一个含有芳基酯、
硫酯或酰胺的杂环环或环系,该环或环系容易受到
化学攻击而解离为瞬态化合物。该杂环环与酯、
硫酯或酰胺基团的羰基相连,并具有一个杂原子处于氧化状态,使得通过解离与羰基相连的碳化合物发生
化学发光。该杂环环或环系通过有机基团与其结合,并含有与活性氢含有化合物反应的官能团。芳环是一个环或环系,其环碳与酯、
硫酯或酰胺的氧、
硫或氮相连,并在六元环上含有取代基,起到空间和电子上的阻碍,以防止酯、
硫酯或酰胺键的
水解。可选地,在杂环环系的peri位上有一个电子给体取代基。芳环上的取代基至少包括一个ortho电子给体取代基,与peri取代基一起,至少包括两个邻接于酯、
硫酯或酰胺键的电子给体取代基;芳环上至少有一个meta或para取代基,其.sigma..sub.p值大于0且小于1。还描述了使用这种标记化合物的检测和检测试剂盒。