Synthesis of gallotannins.
As a contribution to the synthesis of gallotannins, four O-galloyl-D-glucoses (3-O-, 6-O-, 3,6-di-O-, 3,4,6-tri-O-galloyl-D-glucose) have been prepared by the reaction of tri-O-benzylgalloyl chloride and partially protected glucose derivatives (1,2-O-, and 1,2:5,6-di-O-isopropylidene-alpha-D-glucofuranose), followed successively by catalytic debenzylation (Pd-C) and controlled acid hydrolysis. Their structures were established from their behavior on TLC and from their 1H and 13C NMR spectra.
He
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The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, PR China.
Shi
B
B
Yao
K
K
Luo
Y
Y
Ma
Z
Z
D000975:Antioxidants / Q000737:chemistry; D047348:Hydrolyzable Tannins / Q000138:chemical synthesis* / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D010946:Plants, Medicinal / Q000737:chemistry; D013634:Tannins / Q000138:chemical synthesis / Q000737:chemistry
D000975:Antioxidants; D047348:Hydrolyzable Tannins; D013634:Tannins; C060474:glucogallin