A Synthesis of Oxolenes and Furans via Oxacyclopentylidene Chromium and Molybdenum Complexes
作者:Bernd Schmidt、Philip Kocienski、Gillian Reid
DOI:10.1016/0040-4020(95)00990-6
日期:1996.1
An easy and convenient preparation of substituted oxolenes and furans by metal-assisted cyclization of alkynols using labile pentacarbonylchromium and pentacarbonylmolybdenum complexes is described.
Stereoselective synthesis of 1,2,4-triols via intramolecular bis-silylation of CarbonCarbon triple bonds followed by hydrogenation
作者:Masahiro Murakami、Hideaki Oike、Mitsuru Sugawara、Michinori Suginome、Yoshihiko Ito
DOI:10.1016/s0040-4020(01)89908-7
日期:1993.5
new strategy for the stereoselectivesynthesis of 1,2,4-triols has been developed. An alkyne tethered to a disilanyl group, upon treatment with palladium acetate and tert-alkyl isocyanide, furnished an exocyclic bis-silylated olefin. Subsequent hydrogenation took place from the less-hindered side of the ring producing cis-disubstituted oxasilolane. Oxidation of the two CSi bonds of the hydrogenated