Reagent-Based Scaffold Diversity for DNA-Encoded Library Design: Solid Phase Synthesis of DNA-Tagged sp-Rich Heterocycles by SnAP Chemistry.

Reactions that require strictly dry conditions are challenging to translate to a DNA-encoded library format. Controlled pore glass solid support-connected DNA oligonucleotide-aldehyde conjugates could be condensed with SnAP reagents and cyclized to various sp-rich heterocycles. The Boc-group of products provided a handle for product purification, and its facile removal under acidic conditions was tolerated by a chemically stabilized barcode.