Tryptophan (Trp) and tryptophan derivatives are C2-arylated. A C–Hactivation process allows the preparation of both protected and unprotected arylated-Trp amino acids, directly from the amino acid precursor and aryl iodides. The obtained compounds are suitable for standard solid-phase peptide synthesis.
Additive-Free Pd-Catalysed C-2 Arylation of Tryptophan Derivatives with Diaryliodonium Salts
作者:Jian Sun、Jun Jiang、Heng Pan、Jianjun Li
DOI:10.3184/174751918x15232701502261
日期:2018.4
An efficient, mild and Pd-catalysed C-2 arylation of Fmoc-L-tryptophan with diaryliodoniumsalts has been developed, giving easy access to C-2 arylated tryptophan derivatives. This protocol tolerates a variety of functional groups and proceeds smoothly in high yields without any additives. In addition, the chemoseletive C–H arylation with unsymmetricalsalts is described.