Generation of carbon-carbon double bonds from .beta.-oxygenated phenylseleno, phenylthio, and iodo species. A new use for the chlorotrimethylsilane-sodium iodide reagent
The claisen rearrangement in synthesis: acceleration of the johnson orthoester protocol en route to bicyclic lactones
作者:Graham B. Jones、Robert S. Huber、Sotheary Chau
DOI:10.1016/s0040-4020(01)80306-9
日期:1993.1
Catalysis of the Claisenorthoesterrearrangement of triethyl orthoacetate and a number of 2-cycloalken-1-ols has been achieved using acidic catalysis and brief microwavethermolysis in DMF. Unlike conventional methods of thermolysis, very high yields of rearranged products are typically obtained in less than ten minutes, and the Claisen products themselves require no further purification. The synthetic
Synthesis of tricyclic ketones by copper-catalyzed cyclization of monocyclic olefinic diazoketones
作者:W.von E. Doering、E.T. Fossel、R.L. Kaye
DOI:10.1016/s0040-4020(01)82198-0
日期:1965.1
Intramolecular trapping of intermediates of the copper-ketocarbene type by the double bond of monocyclic olefins leads to a variety of tricyclicketones. The photolytically generated ketocarbene cannot be trapped in this way to a significant degree. Sufficient examples of the method are given to indicate its general usefulness in the synthesis of ketocyclopropanes.