Synthesis, separation and NMR spectral analysis of methyl apiofuranosides
作者:Tadashi Ishii、Masayuki Yanagisawa
DOI:10.1016/s0008-6215(98)00262-6
日期:1998.12
Abstract Methyl apiofuranosides were prepared by methanolysis of d -apiose. Four methyl apiofuranosides were separated by ion-exclusion and normal phase chromatography and their structures were characterized by 1 H and 13 C NMR spectroscopy. The composition of methyl apiofuranosides was almost the same as that of d -apiose in D 2 O.
摘要通过d-apiose的甲醇水解反应制备了甲基apiofuranosides。通过离子排斥法和正相色谱法分离出四种甲基呋喃呋喃糖苷,并通过1 H和13 C NMR光谱对它们的结构进行了表征。甲基apiofuranosides的组成与D 2 O中的d -apiose几乎相同。
Synthesis of two rigid diacylglycerol analogues having a bis-butyrolactone skeleton
作者:Jeewoo Lee、Kelly Teng、Victor E. Marquez
DOI:10.1016/s0040-4039(00)91668-x
日期:1992.3
The stereoselective synthesis of two rigid diacylglycerol analogues starting from protected D-apio-L-furanose (apiose) is described. The construction of the desired bis-butyrolactone bicyclic structure was accomplished via an intramolecular radical cyclization.
Synthesis of 3-C-(hydroxymethyl)erythritol and 3-C-methylerythritol
作者:Zbigniew J. Witczak、Roy L. Whistler、James R. Daniel
DOI:10.1016/0008-6215(84)85201-5
日期:1984.10
3-C-(Hydroxymethyl)erythritol was prepared from 3-C-(hydroxymethyl)-2,3-O-isopropylidene-D-erythro-tetrofuranose (4) by hydrolysis followed by reduction, or by reduction followed by hydrolysis. Monotosylation of 4, followed by reduction with lithium aluminum hydride and hydrolysis, afforded 3-C-methylerythritol.
Conformationally constrained analogues of diacylglycerol (DAG). 14.1 Dissection of the roles of the sn-1 and sn-2 carbonyls in DAG mimetics by isopharma cophore replacement
作者:Victor E. Marquez、Rajiv Sharma、Shaomeng Wang、Nancy E. Lewin、Peter M. Blumberg、In-Sik Kim、Jeewoo Lee
DOI:10.1016/s0960-894x(98)00307-2
日期:1998.7
The replacement of the sn-l and sn-2 carbonyl esters in DAG-surrogate lactones by sulfonate esters showed that their isosteric properties in protein kinase C binding are controlled by the location of the hydrophobic alkyl chain on the molecule. The CO and SO2 groups appear to be true isosteres only when they are adjacent to the alkyl chain, which is presumed to insert normal to the lipid bilayer. Published by Elsevier Science Ltd.
Total Synthesis of Carba-<scp>d</scp>-fructofuranose via a Novel Metathesis Reaction
作者:Mohindra Seepersaud、Yousef Al-Abed
DOI:10.1021/ol990275n
日期:1999.11.1
[GRAPHICS]Carba-o-fructofuranose 2b was synthesized in 11 steps (45%), from 2,3,5-tri-O-benzyl-D-arabinofuranose 5 using a ring closing metathesis. Schrock's catalyst was employed on the unique substituted diene synthon 4 to furnish the pentahydroxlated cyclopentene 3. Hydrogenation afforded 2b.