Synthesis and mesogenic properties of glycosyl diacylglycerols
摘要:
We synthesised glycosyl diacylglycerols bearing unsaturated or chiral methyl branched fatty acid chains. The thermotropism was measured with polarising microscopy and additionally the lyotropism with the contact preparation method. The synthesised compounds displayed thermotropic S-A (lamellar), cubic and columnar phases and investigation of the lyotropic phase behaviour led to the observation of inverted bicontinuous cubic V-H phases, lamellar L-x phases and normal bicontinuous cubic V-I phases, The phases are discussed with respect to the chemical structures that have been varied systematically to derive structure-property relationships. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved.
Synthesis and mesogenic properties of glycosyl diacylglycerols
摘要:
We synthesised glycosyl diacylglycerols bearing unsaturated or chiral methyl branched fatty acid chains. The thermotropism was measured with polarising microscopy and additionally the lyotropism with the contact preparation method. The synthesised compounds displayed thermotropic S-A (lamellar), cubic and columnar phases and investigation of the lyotropic phase behaviour led to the observation of inverted bicontinuous cubic V-H phases, lamellar L-x phases and normal bicontinuous cubic V-I phases, The phases are discussed with respect to the chemical structures that have been varied systematically to derive structure-property relationships. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved.
RCM-Based Synthesis of a Variety of β-<i>C</i>-Glycosides and Their in Vitro Anti-Solid Tumor Activity
作者:Maarten H. D. Postema、Jared L. Piper、Russell L. Betts、Frederick A. Valeriote、Halina Pietraszkewicz
DOI:10.1021/jo040254t
日期:2005.2.1
The synthesis of a number of biologically relevant C-glycosides has been carried out through the use of an esterification-ring-closing metathesis (RCM) strategy. The required acid precursors were readily prepared via a number of standard chemical transformations followed by dehydrative coupling of these acids with several olefin alcohols 1 to yield the precursor esters 3 in excellent yield. Methylenation of the esters 3 was followed by RCM and in situ hydroboration-oxidation of the formed glycals to furnish the protected beta-C-glycosides 6 in good overall yield. Several examples were converted to the corresponding C-glycoglycerolipids 17 and subsequently screened against solid-tumor cell lines for in vitro differential cytotoxicity.
Synthesis and mesogenic properties of glycosyl diacylglycerols
作者:H.M von Minden、M Morr、G Milkereit、E Heinz、V Vill
DOI:10.1016/s0009-3084(01)00202-x
日期:2002.1
We synthesised glycosyl diacylglycerols bearing unsaturated or chiral methyl branched fatty acid chains. The thermotropism was measured with polarising microscopy and additionally the lyotropism with the contact preparation method. The synthesised compounds displayed thermotropic S-A (lamellar), cubic and columnar phases and investigation of the lyotropic phase behaviour led to the observation of inverted bicontinuous cubic V-H phases, lamellar L-x phases and normal bicontinuous cubic V-I phases, The phases are discussed with respect to the chemical structures that have been varied systematically to derive structure-property relationships. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved.