Synthesis and nuclear magnetic resonance studies of some N-acylated methyl 4-amino-4,6-dideoxy-α-<scp>D</scp>-mannopyranosides
作者:Lennart Kenne、Per Unger、Thomas Wehler
DOI:10.1039/p19880001183
日期:——
The methyl α-glycosides of 4-amino-4,6-dideoxy-D-mannopyranose (perosamine), N-acylated with either formic, acetic, or (S)-2,4-dihydroxybutanoic acid, have been synthesized. The 1H and 13C n.m.r. spectra of these substances and the parent, non-N-acylated glycoside, demonstrated how the chemical shifts are influenced by the N-acylation. The N-formyl derivative occurred in two conformations, s-cis and
已经合成了被甲酸,乙酸或(S)-2,4-二羟基丁酸N-酰化的4-氨基-4,6-二脱氧-D-甘露吡喃糖(过胺)的甲基α-糖苷。的1 H和13 C ^这些物质和亲本的NMR谱,非Ñ -acylated糖苷,演示了如何将化学位移是由影响Ñ酰化。所述Ñ发生在两种构象,仲-甲酰基衍生物的顺式和S-反,和它们之间的自由能屏障,86.9千焦摩尔-1,通过动态核磁共振谱定义。
A New Efficient Synthesis of Nicotianamine and 2'-Deoxymugineic Acid
Nicotianamine and 2'-deoxymugineic acid, phytosiderophores, have been efficiently synthesized, which will be suitable for large scale production of these plant physiologically important compounds. The synthetic method for 2',3 ''-dideoxy-3 ''-oxomugineic acid was also investigated.
[EN] IMMUNOMODULATORY GLYCOSPHINGOLIPIDS AND METHODS OF USE THEREOF<br/>[FR] GLYCOSPHINGOLIPIDES IMMUNOMODULATEURS ET PROCÉDÉS D'UTILISATION DE CEUX-CI
申请人:[en]PRESIDENT AND FELLOWS OF HARVARD COLLEGE
公开号:WO2023096715A2
公开(公告)日:2023-06-01
Provided herein are a subset of alpha-galactosylceramide (alpha-GC) compounds having improved immunomodulatory activity, particularly with respect to NKT cell number and activity. Also provided herein are methods of use of such compounds, including in the modulation of NKT cells and/or activity in vivo. Further provided are combinatorial synthesis methods for generating alpha-GC compounds of specifically defined structure and thereby generating pure preparations thereof.