PMID- 18642828 OWN - NLM STAT- MEDLINE DCOM- 20081020 LR - 20131121 IS - 1523-7052 (Electronic) IS - 1523-7052 (Linking) VI - 10 IP - 16 DP - 2008 Aug 21 TI - Efficient sequential segment coupling using N-alkylcysteine-assisted thioesterification for glycopeptide dendrimer synthesis. PG - 3531-3 LID - 10.1021/ol801340m [doi] AB - A highly pure MUC1-derived glycopeptide dendrimer of 22 kDa was prepared by a sequential segment coupling, achieved by an N-alkylcysteine (NAC)-assisted thioesterification. The glycopeptide having C-terminal NAC was prepared by the Fmoc method and converted to the thioester by 3-mercaptopropionic acid treatment. The thioester was condensed with a lysine trimer carrying NAC to afford tetramer, which was then converted to the thioester. Two tetramers were condensed with ethylenediamine to give the octameric glycopeptide dendrimer. FAU - Ozawa, Chinatsu AU - Ozawa C AD - Department of Applied Biochemistry, Institute of Glycotechnology, Tokai University, Kanagawa 259-1292, Japan. FAU - Katayama, Hidekazu AU - Katayama H FAU - Hojo, Hironobu AU - Hojo H FAU - Nakahara, Yuko AU - Nakahara Y FAU - Nakahara, Yoshiaki AU - Nakahara Y LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20080719 PL - United States TA - Org Lett JT - Organic letters JID - 100890393 RN - 0 (Dendrimers) RN - 0 (Esters) RN - 0 (Glycopeptides) RN - 0 (Sulfhydryl Compounds) RN - K848JZ4886 (Cysteine) SB - IM MH - Carbohydrate Conformation MH - Carbohydrate Sequence MH - Cysteine/*analogs & derivatives/*chemistry MH - Dendrimers/*chemical synthesis/chemistry MH - Esters/*chemistry MH - Glycopeptides/*chemical synthesis/chemistry MH - Molecular Sequence Data MH - Sulfhydryl Compounds/*chemistry EDAT- 2008/07/23 09:00 MHDA- 2008/10/22 09:00 CRDT- 2008/07/23 09:00 PHST- 2008/07/23 09:00 [pubmed] PHST- 2008/10/22 09:00 [medline] PHST- 2008/07/23 09:00 [entrez] AID - 10.1021/ol801340m [doi] PST - ppublish SO - Org Lett. 2008 Aug 21;10(16):3531-3. doi: 10.1021/ol801340m. Epub 2008 Jul 19.