4,4′-Dimethoxytriphenylmethyl chloride (DMTrCl) can be used as a protecting agent:
- For hydroxyl group of nucleosides/nucleotides as its O-(4,4′-dimethoxytrityl)derivative.[1][2]
- For 10 sulfhydryl group of oligonucleotide analogs as its DMTr thioether.[3]