Synthesis of 4-mercapto-l-lysine derivatives: Potential building blocks for sequential native chemical ligation
作者:Kalyan Kumar Pasunooti、Renliang Yang、Seenuvasan Vedachalam、Bala Kishan Gorityala、Chuan-Fa Liu、Xue-Wei Liu
DOI:10.1016/j.bmcl.2009.09.107
日期:2009.11
A general and diastereoselectivesynthesis of (2S, 4S)-4-mercapto-l-lysine derivative was described. The key features of this synthesis include Zn-mediated diastereoselective Reformatsky reaction and selective reduction of methyl ester with sodium borohydride. Introduction of thiol functional group on lysine side chain proved to be appropriate for dual native chemical ligation. This methodology allows
Synthesis of a Galactosylated 4-Hydroxylysine Building Block and Its Incorporation into a Collagen Immunodominant Glycopeptide
作者:Julien Marin、Jean-Paul Briand、Gilles Guichard
DOI:10.1002/ejoc.200700806
日期:2008.2
An analogue of the immunodominant glycopeptide from type II collagen encompassing residues 256–270 has been prepared by substituting β-D-galactopyranosyl-(2S,4R)-4-hydroxy-L-lysyl (Gal-4-Hyl) for β-D-galactopyranosyl-(2S,5R)-5-hydroxy-L-lysyl (Gal-5-Hyl) at position 264. The synthesis of the 4-hydroxylysine aglycon started from the known (2S,4S)-4-hydroxy-6-oxo-1,2-piperidinedicarboxylate (3) and involved