Convenient synthesis of acetonide-protected 3,4-dihydroxyphenylalanine (DOPA) for Fmoc solid-phase peptide synthesis
作者:Zhongqiang Liu、Bi-Huang Hu、Phillip B. Messersmith
DOI:10.1016/j.tetlet.2008.07.052
日期:2008.9
We report a facile approach to the synthesis of acetonide and Fmoc protected 3,4-dihydroxyphenylalanine (DOPA), Fmoc-DOPA(acetonide)-OH. By protecting the amino group of DOPA with a phthaloyl group and the carboxyl group as a methyl ester, acetonide protection of the catechol of DOPA derivative was realized in the presence of p-toluenesulfonic acid. Following removal of protecting groups, the intermediate
Ru‐Catalyzed C−H Hydroxylation of Tyrosine‐Containing Di‐ and Tripeptides toward the Assembly of L‐DOPA Derivatives
作者:Paula Andrade‐Sampedro、Jon M. Matxain、Arkaitz Correa
DOI:10.1002/adsc.202200234
日期:2022.6.21
C(sp2)−H hydroxylation of a collection of Tyr-containing di- and tripeptides featuring the use of a carbamate as a removable directing group and PhI(OCOCF3)2 (PIFA) as oxidant. This air-compatible tagging technique is reliable, scalable and provides access to L-DOPA (L-3,4-dihydroxyphenylalanine) peptidomimetics in a racemization-free fashion. Density Functional Theory calculations support a Ru(II)/Ru(IV)
challenging task of prime interest in chemical biology and organic synthesis. We strategically transform the phenol ring within Tyr into a chelating group to further direct a C−H acetoxylation event. As a result, acetoxylation occurs regardless of the Tyr unit position within the peptide sequence.