The First Example of the 1-Chalcogene-Substituted Formylolefination of the Ketones and Aldehydes Using 1-Lithio-2-ethoxyvinyl Chalcogenides
摘要:
The alpha-chalcogene-substituted formylolefinations of ketones and aldehydes proceeded using 1-lithio-2-ethoxyvinyl chalcogenides/PPSE or TMSOTf produce the alpha-chalcogenoformylolefinated products 4a-1 in high yields. Tandem-formylolefination provided the (2Z,4Z)-2,4-bis(chalcogeno)pent-2,4-dienals 5d,h,i and (2Z,4Z,6Z)-2,4,6-tris(phenylthio)hept-2, derivatives 7d and 8d, respectively.
Chemistry of allene sulphoxides: novel transformations of acetylenic alcohols
作者:Ian Cutting、Philip J. Parsons
DOI:10.1039/c39830001209
日期:——
The preparation and reactions of allenesderived from 1-phenylthio substituted acetylenicalcohols are described; this chemistry offers new routes to allenyl sulphides, acyl anion equivalents, and substituted unsaturated aldehydes.
Rapid, high-yield cleavage of enol and dienol methyl ethers under mild conditions using chlorotrimethylsilane/sodium iodide
作者:Zenyk Kosarych、Theodore Cohen
DOI:10.1016/s0040-4039(00)92843-0
日期:1980.1
A number of enol and dienol methylethers are rapidly cleaved to aldehydes and ketones in quantitative yields by the use of chlorotrimethylsilane/sodium iodide.