Total Syntheses of D-xylo- and D-arabino-Phytosphingosine Based on the Syntheses of Chiral 1,3-Oxazines
作者:Yu Mu、Tian Jin、Gun-Woo Kim、Jin-Seok Kim、Sung-Soo Kim、Yong-Shou Tian、Chang-Young Oh、Won-Hun Ham
DOI:10.1002/ejoc.201200064
日期:2012.5
An efficient, stereocontrolled, and short synthetic method for the preparation D-xylo- and D-arabino-phytosphingsine was achieved utilizing chiral oxazines. The key features of this strategy are the stereoselective intramolecular oxazine formation catalyzed by palladium(0) and an intermolecular olefin cross-metathesis reaction.
Regioselective Inversion of the Hydroxyl Group in <scp>d</scp>-<i>ribo</i>-Phytosphingosine via a Cyclic Sulfate and Bis-Sulfonate Intermediate
作者:Yun Mi Lee、Dong Jae Baek、Seokwoo Lee、Deukjoon Kim、Sanghee Kim
DOI:10.1021/jo101757k
日期:2011.1.21
The selective synthesis of d-xylo- and d-lyxo-phytosphingosines from commercially available d-ribo-phytosphingosine is described. Thermolysis of the N-carbonyl protectedcyclic sulfate led to an inversion of configuration of the proximal hydroxylgroup to give the xylo-isomer, whereas the corresponding bis-sulfonate resulted in an inversion of configuration of the distal hydroxylgroup to give the lyxo-isomer
A library of 64 phytosphingolipid analogues resulting from the systematic variation of the C1, C3, C4, and the N-acyl moiety of phytosphingosine (PHS) has been prepared from common scaffolds derived from the chiral pool and Sharpless asymmetric dihydroxylation reactions. Library members have been evaluated as growth inhibitors of the yeast Saccaromyces cerevisiae. In addition, 1-amino-N-pivaloyl PHS analogues were also tested as IPC synthase inhibitors, in comparison with the natural product khafrefungin.
Synthetic C-glycolipid and its use for treating cancer, infectious diseases and autoimmune diseases
申请人:——
公开号:US20040127429A1
公开(公告)日:2004-07-01
The invention is directed to compounds of formula (I)
1
wherein X is O or NH; R′ is a hydrocarbon chain; R
3
and R
4
are hydrogen, OH or a monosaccharide; R
5
is hydrogen or a monosaccharide; Q′ is optionally present and may be a C
1-10
hydrocarbon; X′ is optionally present and may be O, S or NR
8
; and Q
3
may be a hydrocarbon or hydrogen. The invention is also directed to the use of the compounds for treating cancer, infectious diseases and autoimmune diseases. The invention is also directed to syntheses of the compounds of formula (I).
Synthetic C-glycolipid and its use for treating cancer, infectious diseases, and autoimmune diseases
申请人:Tsuji Moriya
公开号:US20060019246A1
公开(公告)日:2006-01-26
The invention is directed to compounds of formula (I)
wherein X is O or NH; R′ is a hydrocarbon chain; R
3
and R
4
are hydrogen, OH or a monosaccharide; R
5
is hydrogen or a monosaccharide; Q′ is optionally present and may be a C
1-10
hydrocarbon; X′ is optionally present and may be O, S or NR
8
; and Q
3
may be a hydrocarbon or hydrogen. The invention is also directed to the use of the compounds for treating cancer, infectious diseases and autoimmune diseases. The invention is also directed to syntheses of the compounds of formula (I).