A novel galactosylated cholesterol with mono-galactoside moiety, (5-cholesten-3-yl)-4-oxo-4-[2-(lactobionylamido)ethylamido]butanoate 6 was synthesized. Its chemical structure was characterized by IR, ESI-MS, ^13C...
Two new sterol have been isolated from the South China Sea marine organism. Compound 1 was isolated from the sponge Polymastia sobustia and compound 2 was obtained from the soft coral Sinularia inexplicata. Their stru...
Preost-Woodward hydroxylation of 2 gave the 22S,23S-glycol(3), contrary to expectation.It is suggested that the formation of the two possible iodonium ions(4a and 4b)are reversible,thus allowing the discriminatory ace...