名称:
Synthesis of a Prenylated and Immunosuppressive Marine Galactosphingolipid with Cyclopropane-Containing Alkyl Chains: (2S,3R,11S,12R,2′′′R,5′′′Z,11′′′S,12′′′R)-Plakoside A and Its (2S,3R,11R,12S,2′′′R,5′′′Z,11′′′R,12′′′S) Isomer
摘要:
Plakoside A (1) {(2S,3R,11R*,12S*)-2-[(2'''R,5'''Z,11'''R*, 12'''S*)-2"'-hydroxy-11"',12"'-methylene-5"'-docosenamido] -1-O-[2'-O-(3"-methyl-2"-butenyl)-beta -D-galactopyranosyl]-11,12-methylene-1,3 -docosanediol} is a prenylated galactosphingolipid isolated as an immunosuppressant from the marine sponge Plakortis simplex. (2S,3R,11S,12R,2'''R,5'''Z,11'''S,12'''R)-Plakoside A (1) has been synthesized by combining the sphingosine part 16, the alpha -hydroxy acid part 28, and the prenylated sugar part 33. (2S,3R,11R,12S,2'''R,5'''Z,11'''R, 12'''S)-Plakoside A (1') has also been synthesized.