Synthesis of a peptidyldimannosyl phosphate: fragment of the variant-specific surface glycoprotein membrane anchor from trypanosoma brucei
作者:R. Verduyn、J.J.A. Beliën、C.M. Dreef-Tromp、G.A. van der Marel、J.H. van Boom
DOI:10.1016/0040-4039(91)80242-x
日期:1991.11
Condensation of protected beta-benzyl-aspartate 4 with 2-amino-ethanol, subsequent deprotection of the amino function and coupling with N',N'-di-benzylocarbonyl-lysine (7) afforded the peptidyl alcohol 8. Glycosylation of methyl 3,4,6 tri-O-benzyl-alpha-D-mannopyranoside (11) by ethyl 2,6-di-O-benzoyl-3,4-di-O-benzyl-1-thio-alpha-D-mannopyranoside (14) gave, after debenzoylation and protection of the 2'-hydroxyl function, the suitably protected dimannoside 21. Phosphitylation of 21 with benzyloxy-bis-(N, N-diisopropylamino)phosphine (18) followed by the addition of 8 gave, after oxidation and subsequent hydrogenolysis of the benzyl groups, the title compound in a good yield.