- Maleimide-dimethylfuran exo adducts: effective maleimide protection in the synthesis of oligonucleotide conjugates.
Maleimide-dimethylfuran exo adducts: effective maleimide protection in the synthesis of oligonucleotide conjugates.
Organic letters (2011-07-28)
Albert Sánchez, Enrique Pedroso, Anna Grandas
PMID21790151
RESUMEN
The reaction of maleimide-containing compounds with 2,5-dimethylfuran gives a mixture of exo and endo isomers from which the exo cycloadduct can be easily isolated taking advantage of its stability in concentrated aqueous ammonia. Bifunctional compounds incorporating a dimethylfuran-protected maleimide (exo adduct) have been attached to resin-linked oligonucleotide chains. Removal of protecting groups masking oligonucleotide functionalities followed by retro-Diels-Alder maleimide deprotection affords maleimido-oligonucleotides suitable for conjugation, as assessed by their reaction with different thiols.
MATERIALES