On-DNA Palladium-Catalyzed Hydrogenation-like Reaction Suitable for DNA-Encoded Library Synthesis
journal contributionposted on 24.12.2020, 21:46 by Julián Priego, Eduardo de Pedro Beato, Jesús Benavides, Adrián Gironda-Martínez, Fernando González, Jesús Blas, María Dolores Martín-Ortega, Ramón Rama-Garda, Jesús Ezquerra, Miguel A. Toledo, Alicia Torrado
Herein we describe a method to orthogonally remove on-DNA N-Cbz, N-Alloc, N-Allyl, O-Bn, and O-Allyl protecting groups in the presence of other common protecting groups to afford free amines and carboxylic acids, respectively. The developed method uses NaBH4 as the source of hydrogen in the presence of Pd(OAc)2 under DNA aqueous conditions. In addition, under the developed conditions we were able to successfully hydrogenate triple and double bonds to totally saturated compounds. Furthermore, we introduce a new alternative procedure to reduce azides and aromatic nitro compounds to primary amines.