Synthesis of amphotericin B. 2. fragment C-D of the aglycone

Fragment C-D, the C(21)-C(37) unit of the aglycone of amphotericin B, has been synthesized.     

A new elongation reaction of three carbon units

A new modification of Peterson reaction leading to elongation of three carbon units by treatment of aldehydes with titanium ate complex, prepared from 1-lithio-1-(1-alkoxy)allyltrimethylsilane and titanium(IV) isopropoxide, is described.     

E- and Z-vinyloxyboranes (alkenyl borinates): stereoselective formation and aldol condensation

Vinyloxyboranes, intermediates of Hooz' reaction, are almost exclusively $\text{E}$-isomers which can be isomerized to the $\text{Z}$-isomers. Both isomers undergo stereoselective aldol condensations.     

Macrocyclic hexaketone as a specific host of uranyl ion

A novel synthetic method was described for a new macrocyclic hexaketone, 1,3,9,11,17,19-hexaoxocyclotetracosane, which extracted 98 % of uranyl ion into benzene phase from a dilute (10 ppm) aqueous solution of pH 8.     

Acetylpinnasterol and pinnasterol,ecdysone-like metabolites,from the marine red alga laurenciapinnata yamada

The structures of two sterols, isolated from the title alga and designated as acetylpinnasterol and pinnasterol, were determined on the basis of the X-ray crystallography. These metabolites are the first marine phytosterols with ecdysone-like structures and biological activity as moulting hormones.