| abstract |
The invention concerns compounds of general formulae (Ia) and (Ib), in which R?1 and R2¿, which may be identical or different, designate hydrogen, C¿1?-C6 lower alkyl, straight-chain or branched, or an aryl group, optionally substituted by electron-attracting groups, R?3¿ means a cleavable group, W designates hydrogen, halogen or a pseudohalogen, at least one of the groups R?4 and R5¿ designates a group stabilizing the dioxethane structure, at most one of the groups R?4 and R5¿ designating hydrogen, and X or Y designating oxygen, N-R or C(R)¿2?, R having the meanings given for R?1 or R2¿, or a mesomeric double bond or a carbonyl group, and n being 0 or 1 and m being 1 or 2. The invention further concerns a process for preparing these compounds. The compounds are novel and can be used as substrates in immunological assays and DNA diagnoses using colour-forming activating agents. |