Synthesis of Artificial Glycoconjugate Polymers Carrying 6-O-Phosphocholine α-D-Glucopyranoside, Biologically Active Segment of Main Cell Membrane Glycolipids ofMycoplasma Fermentas
摘要:
As carbohydrate probes to investigate the biological activity of novel phosphocholine-containing glycoglycerolipids of M. fermentans, artificial glycoconjugate polymers carrying 6-O-phosphocholine alpha-D-glucopyranoside were synthesized. The synthesis involved a-selective 1-O-p-nitrophenylation (pNP) of 1,6-di-O-acetyl-2,3,4-tri-O-benzyl-D-glucopyranose in the presence of a Lewis acid followed by the introduction of a phosphocholine group at position O-6 by an amidite method. The pNP group was converted into ap -N-methacrylamidophenyl group for subsequent radical polymerization.
Synthesis of Artificial Glycoconjugate Polymers Carrying 6-O-Phosphocholine α-D-Glucopyranoside, Biologically Active Segment of Main Cell Membrane Glycolipids ofMycoplasma Fermentas
摘要:
As carbohydrate probes to investigate the biological activity of novel phosphocholine-containing glycoglycerolipids of M. fermentans, artificial glycoconjugate polymers carrying 6-O-phosphocholine alpha-D-glucopyranoside were synthesized. The synthesis involved a-selective 1-O-p-nitrophenylation (pNP) of 1,6-di-O-acetyl-2,3,4-tri-O-benzyl-D-glucopyranose in the presence of a Lewis acid followed by the introduction of a phosphocholine group at position O-6 by an amidite method. The pNP group was converted into ap -N-methacrylamidophenyl group for subsequent radical polymerization.
In order to determine the absolute configuration of a novel aminoglycoglycerolipid isolated from Mycoplasma fermentans, the possible two diastereomers were stereoselectively synthesized by using (S)- and (R)-glycidols as the key building block. Their H-1-H-1-cosy spectra compared with those of the natural product allowed us to determine the absolute configuration of the glycolipid. (C) 1999 Elsevier Science Ltd. All rights reserved.