Reductive decomplexation of biscobalthexacarbonyl acetylenes into olefins
作者:Seijiro Hosokawa、Minoru Isobe
DOI:10.1016/s0040-4039(98)00281-0
日期:1998.4
found other reductive conditions with endo-cyclic complexes, and recently other reductive conditions with both endo- and exo-cyclic complexes using either tributyltin hydride or triethylsilane. The original acetylene derivatives transformed selectively either into the corresponding cis olefins or cis-vinylsilanes.
Mirror Image Synthesis of Left Ends of Ciguatoxin and Gambiertoxin 4b
作者:Seijiro Hosokawa、Minoru Isobe
DOI:10.1021/jo980088n
日期:1999.1.1
Three compoundsrelated to the AB fragments of ciguatoxin and gambiertoxin 4b and two diastereomers (at the C-2 position) of the ABC fragment of ciguatoxin have been synthesized in enantiomeric form. The stereochemistry of the C-2 position was introduced selectively from the corresponding pentose derivative. Construction of the A ring with its side chain was completed by Nicholas type cyclization of